This one started as a 14ft Collins shuttle bus on a Chevy chassis. It left our shop as a fully equipped mobile espresso bar, built from the frame up for the mountain roads and tourist crowds of Estes Park, Colorado. The owner wanted something that could handle the altitude, the weather, and the kind of morning rush you get when 4.2 million people a year are passing through your town on the way to Rocky Mountain National Park.
Bus conversions are a different animal than a standard food truck build. You are not starting with a blank box. You are working inside an existing shell, which means every decision about layout, weight distribution, and utility routing has to account for the structure that is already there. That is also what makes them interesting. A shuttle bus gives you a wider stance, a lower center of gravity, and a cabin height that most traditional truck bodies cannot match. For a coffee operation where you need room for a commercial espresso machine, a grinder, a full-size refrigerator, and a barista who actually has space to work, that extra width and headroom matters.
Stripping the Bus and Starting Fresh
The first step in any bus conversion is gutting the interior down to bare metal. Every seat, every bolt, every piece of factory flooring comes out. On this Collins, we pulled the entire passenger compartment, removed the original rubber flooring, and cleaned the subfloor down to the steel frame. From there we built it back up as a commercial kitchen space, not a passenger vehicle.
The walls were finished in FRP (fiberglass reinforced panels), which is the same material you see in commercial restaurant kitchens and health department approved food service facilities across the country. FRP is smooth, nonporous, easy to sanitize, and holds up well against moisture and temperature swings. In a mountain environment like Estes Park where you can see 90 degrees in July and single digits in January, having wall material that does not warp, crack, or absorb moisture is not optional. It is a requirement.
The floor got covered in aluminum diamond plate, which is standard in our builds for a reason. Diamond plate is slip resistant even when wet, incredibly durable under foot traffic and dropped equipment, and easy to clean at the end of a long service day. When you are pulling shots and steaming milk for six or eight hours straight, you want a floor that can handle spills without becoming a safety hazard.
The Espresso Setup
The heart of this truck is a Rancilio commercial espresso machine. Rancilio has been building commercial espresso equipment in Italy since 1927, and their machines are a staple in specialty coffee shops worldwide. For a mobile operation, the Rancilio is a strong choice because it delivers the kind of thermal stability and shot consistency that serious baristas demand, while being built tough enough to handle the vibration and movement that comes with life on a truck.
We positioned the Rancilio as the centerpiece of the service counter, directly accessible from the service window so the barista can pull shots and interact with customers at the same time. The counter layout was designed around the natural workflow of a coffee service: beans, grinder, machine, milk station, and pickup, all in a linear sequence that minimizes unnecessary movement. When you are serving a line of hikers who just came down from Bear Lake at 7 AM, speed and flow are everything.
Alongside the espresso machine, the truck carries a full-size refrigerator for milk, cream, cold brew, and any food items the operator wants to offer. In a tourist town like Estes Park, having the cold storage capacity to stock up before a busy weekend means fewer supply runs and more time on the serving line.
Plumbing and Water Systems
Coffee service goes through water fast. Between espresso extraction, milk pitcher rinsing, hand washing, and general cleanup, a mobile coffee operation can easily burn through 20 or 30 gallons in a single service window. We set this truck up with a 30 gallon fresh water tank and a 40 gallon grey water tank, both mounted under the truck to keep the interior floor space open for equipment and movement.
Mounting the tanks underneath the chassis is one of the advantages of a bus conversion. On a standard food trailer, your water tanks usually eat into your interior square footage. With a bus, you have the frame rails and undercarriage space to tuck them away cleanly, which gives the operator more usable workspace inside the cabin.
The truck has a dedicated hand wash sink and a three compartment sink, which together meet the health department requirements for mobile food service in Colorado. The three compartment sink handles wash, rinse, and sanitize cycles for all utensils and equipment. The hand wash sink is separate and dedicated, which is a non-negotiable requirement in virtually every health code jurisdiction in the country. An 8 gallon water heater keeps hot water available on demand for both sinks and for the espresso machine’s water supply.
If you are planning a mobile food operation in Colorado, understanding the permit requirements by state is a good place to start. The plumbing setup on this truck was designed to check every box on the Colorado Department of Public Health and Environment retail food licensing checklist.
Power: The 12kW Generator
A commercial espresso machine is one of the most power-hungry pieces of equipment you can put on a food truck. Between the heating elements, the pump, and the electronics, a machine like the Rancilio can pull 3,000 watts or more on its own. Add in the refrigerator, the water heater, LED lighting, and any auxiliary equipment, and you need serious generating capacity.
We installed a 12kW generator on this build, which gives the operator plenty of headroom above the baseline electrical load. Having that extra capacity is not about being wasteful. It is about making sure the generator is not running at 100% capacity all day long, which shortens its lifespan and increases fuel consumption. A generator running at 60 to 70% of its rated output will last longer, run quieter, and burn less fuel than one that is constantly maxed out. For a deeper look at how to size a generator for your specific equipment list, check out our food truck generator sizing guide.
At altitude, generator performance is another consideration that a lot of first time operators overlook. Estes Park sits at roughly 7,500 feet above sea level. Internal combustion engines lose approximately 3% of their rated power for every 1,000 feet of elevation above sea level. That means a generator rated at 12kW at sea level is producing closer to 9.5 or 10kW in Estes Park. By specifying a 12kW unit, we made sure this truck would still have adequate power even with that altitude derating factored in.
The 5ft Service Window
The service window on this build is five feet wide with an awning style door that flips up and out, creating a shaded overhang for customers standing at the counter. It is a simple design that works incredibly well in practice. The awning provides rain and sun coverage, which matters in a mountain town where afternoon thunderstorms can roll in fast during the summer months.
The window includes self-closing doors and a bug screen, which are small details that make a big difference during actual service. Self-closing doors mean the operator does not have to manually shut the window every time they turn away from the counter, and the bug screen keeps flies and mosquitoes out of the workspace during those warm summer evenings when Estes Park comes alive with tourists walking the Riverwalk.
LED lighting runs throughout the interior, providing bright, even illumination for the workspace. Good lighting is something that gets overlooked on a lot of food truck builds, but when you are starting service at 5:30 in the morning to catch the early hikers, you need to be able to see what you are doing clearly and safely.
Why Estes Park Is Built for a Coffee Truck
Estes Park is the gateway to Rocky Mountain National Park, which drew over 4.2 million visitors in 2024 alone. The town sits at the eastern entrance to the park, and virtually every tourist who enters from the Front Range corridor passes through Estes Park on the way in. That creates a massive captive audience of people who are waking up early to beat the timed entry permits, coming off the trails hungry and tired in the afternoon, or strolling through downtown in the evening looking for something to drink.
The coffee culture in Estes Park is already strong. Established shops like Kind Coffee, Coffee on the Rocks, and Inkwell and Brew have built loyal followings, which tells you there is real demand for quality coffee in this market. A mobile operation has the advantage of being able to set up where those brick and mortar shops cannot: at trailheads, near the park entrance stations, at the weekly farmers markets, and at the events and festivals that run throughout the tourist season from May through October.
The seasonal nature of the business is also worth noting. Estes Park’s peak season runs from June through September, with July alone bringing over 700,000 visitors to the national park. That kind of concentrated demand during a defined window is actually ideal for a mobile coffee operation, because you can run hard during the high season and then reposition, take a break, or focus on local winter business during the quieter months.
All mobile food vendors operating inside Town limits need an active business license from the Town of Estes Park and an Estes Valley Fire Protection District operating permit. Vendors are permitted in the A, CD, CO, CH, and I1 zoning districts, so there is no shortage of legal vending locations within town. If you are thinking about starting a food truck business in a market like this, our complete startup guide walks through the licensing, financing, and operational planning process step by step.
Full Equipment List
- 14ft Collins shuttle bus on Chevy chassis (full conversion)
- FRP walls throughout
- Aluminum diamond plate flooring
- LED interior lighting
- Rancilio commercial espresso machine
- Full-size refrigerator
- 5ft service window with awning door
- Self-closing doors with bug screen
- Dedicated hand wash sink
- Three compartment sink
- 8 gallon water heater
- 30 gallon fresh water tank (under truck)
- 40 gallon grey water tank (under truck)
- 12kW generator
For a full breakdown of what goes into a standard food truck equipment package, take a look at our complete equipment list guide.
Watch the Full Build Walkthrough
This video walks through the entire truck from front to back, covering the construction details, equipment placement, and finishing work that went into this conversion. If you have ever wondered what it actually takes to turn a shuttle bus into a working commercial kitchen on wheels, this is a good place to start.
More Recent Builds
This Estes Park coffee truck is one of several builds we have completed recently across the western United States. Each one is custom designed for the operator’s menu, market, and local regulations. Here are a few others worth checking out:
- 16ft Celiac-Safe Gluten-Free Food Trailer built for El Flavor in Aurora, Colorado
- 18ft Casino Food Truck built for Taste of Pechanga in Temecula, California
- 16ft Donut and Coffee Food Truck built for Sedona, Arizona
- 12ft Funnel Cake and Ice Cream Trailer built for Billings, Montana
If you are thinking about a bus conversion, a traditional food truck, or a trailer build for your own business, get in touch with our team to start the conversation. Every build starts with your menu, your market, and your vision.