7 incredible multimillion-dollar motorhomes

Photo courtesy Millennium Luxury Coaches

If you've never aspired to live in a trailer, you may want to reconsider. Some of the motorhomes out there cost more than the average house -- or an entire block of homes.

This kind of on-the-go luxury doesn't come cheap. The most expensive coach on the market is listed for $3 million. That will buy you red- carpeted entry stairs, glow-in-the-dark exterior paint and a rooftop cocktail lounge.

Celebrity actors like Will Smith and Ashton Kutcher often use these opulent abodes while on set, but famous people and their studios aren't the target demographic for RV businesses. Most customers are successful retired or semi-retired people, according to the Marathon Coach company. Erich Merkle, a sales analyst with Ford, echoed this idea in a recent press release, saying baby boomers with time to travel are the key drivers of luxury motorhome market growth.

If you want to see the world, control the temperature of your floors with the push of a button, or buy a home that can clean itself, a motorcoach could be the best way to travel -- if you have a few million dollars to spare. Take a look at what a million dollar mobile home really looks like.

A $1.7 million custom coach

Photo courtesy Newell Coach

This 45-foot-long motorhome is a 2015 model by the Oklahoma-based company Newell Coach. It is currently for sale at just over $1.7 million. Newell sells its luxury coaches directly to buyers rather than working with dealers, so if you want to talk to someone in person you'll have to head to the Sooner State.

A $1.7 million custom coach

Photo courtesy Newell Coach

The quad-slide vehicle has custom-blended exterior paint, a stacked washer and dryer, kitchen garbage disposal, granite countertops and several 3D-ready televisions. Its glass dash instrumentation system controls a driving camera, in-dash navigator and radar detector.

Will Smith's $2.5 million "The Heat"

Photo courtesy HGTV

Will Smith's $2.5 million, 1,200-square-foot mobile home is one of a kind. Nicknamed "The Heat," this trailer was designed by the Big Pine Key, Florida-based company Anderson Mobile Estates. The model is used by other actors, including Ashton Kutcher when he's on the set of "Two and a Half Men," but this one has been customized to meet Smith's needs. Smith has used it as a home away from home while working on films such as "Men in Black 3," "Ali" and "The Pursuit of Happiness," according to HGTV's "Celebrity Motor Homes."

Will Smith's $2.5 million "The Heat"

Photo courtesy HGTV

The first floor features a lit makeup mirror with a built-in television, offices for Smith's assistants, a full-service kitchen, a $25,000 bathroom with automated windows that turn opaque on command, and "Star Trek" doors that make a distinct space-age swoosh sound when they open and close. The pop-up second floor expands by over 42 inches. It has automated shades, three televisions and a business lounge.

Want to live like a movie star? You can rent all 30 tons of "The Heat" for $9,000 per week.

The $2.2 million Fairfax Edition

Photo courtesy Liberty Coach

This lux Fairfax Edition motorhome is currently on the market for $2.2 million. It was designed by Liberty Coach, a company based in Stuart, Florida. The blue, black, white and silver exterior paint design is by Indiana artist Dean Loucks, who is also known for custom airbrushing on boats and aircraft.

The $2.2 million Fairfax Edition

Photo courtesy Liberty Coach

Liberty Coach's custom programming system works with the iPad to control several aspects of the home, including its audio and video system, heated flooring, air conditioning and LED lights. The Fairfax features two storage bays, a 60-inch outdoor television "e-center" and quartered walnut cabinetry.

The $2.1 million remote-controlled designer coach

Photo courtesy Marathon Coach

You can buy this mansion on wheels for just under $2.1 million -- if you want all the "designer's choice" options, that is. It was converted by the Coburg, Oregon-based Marathon Coach. The 31-year-old company claims to be the largest luxury bus conversion business in the world.

The $2.1 million remote-controlled designer coach

Photo courtesy Marathon Coach

Many of the motorhome's automated features -- including its double-slide expansion -- are controlled by a specialized electrical system. Touchscreens and keypads located throughout the interior control the surround sound and 3D-ready BluRay. The fully decked-out vehicle comes with a salon fireplace, leather furniture, and lit floors made of wood and travertine limestone.

The $2.3 million "Biscayne" Vantaré

Photo courtesy Featherlite Coaches

The 2015 triple-slide "Biscayne" motorhome by Featherlite Coaches in Suffolk, Virginia, is on the market for $2.3 million. It may not go as fast as a Ferrari, but the company says Biscayne's leather-upholstered seats were inspired by the legendary sports cars. Featherlite also wanted to give the vehicle a "cool, chic, beach feel" by featuring two full awnings and LED patio lights for nights by the beach with friends.

The $2.3 million "Biscayne" Vantaré

Photo courtesy Featherlite Coaches

Its kitchen has a dishwasher, two burners, a pull-out pantry and an automatic drawer-locking system to keep food and dishes secure while the home is moving. Both of the coach's 1.5 bathrooms have heated floors, mirrored tile and a surprising amount of storage space. There are several large televisions throughout the home, including a custom "stealth TV" that's built into the mirrored door of the medicine cabinet.

A $2.3 million motorhome with hand-built interiors

Photo courtesy Millennium Luxury Coaches

You can buy this 45-foot, four-slide motorhome for $2.3 million. The 2015 vehicle was converted by Millennium Luxury Coaches, a company based in Sanford, Florida. The company boasts a dedication to craftsmanship -- all the cabinets in this coach were built by hand instead of a machine.

A $2.3 million motorhome with hand-built interiors

Photo courtesy Millennium Luxury Coaches

This home has a built-in pressure washer and a smart-home automation system. The brown and cream-colored exterior color scheme continues inside with a modern décor, which features eye-catching metallic wallpaper, fixtures and overhead mirrors.

The top-of-the-line $3 million EleMMent Palazzo

Photo courtesy Marchi Mobile

For $3 million, you can own the most expensive luxury motorhome in the world. The 40-foot-long, double-decker EleMMent Palazzo was designed by the Austria-based company Marchi Mobile. It went on sale in Dubai in June 2013 to great fanfare, according to Business Insider. It became available to potential U.S. buyers in January.

Buyers can choose between a white or flashy gold exterior for the motor mansion. No matter which color it is during the day, however, the Palazzo is the first of its kind to offer glow-in-the-dark paint for nighttime. Its retractable indoor-outdoor steps come lined with red carpeting for making major entrances (or exits).

The top-of-the-line $3 million EleMMent Palazzo

Photo courtesy Marchi Mobile

The interior comes with heated floors, a 40-inch television, a "wellness bathroom" with a rainfall shower, a fireplace and a self-cleaning system. Its roof area can expand automatically to create a cocktail lounge for entertaining.