The most extreme RVs and campers of 2018

The latest off-the-charts RVs prove that more is more. From awesome off-roaders to pure luxury roaming, these are the RVs we can only dream of owning.

The Mobile Performance RV from Volkner hails from Germany and it has a freaking garage. Imagine rolling with your sports car underneath and towing your off-road rig behind. No compromises, people.

The 39-foot Performance can store up to 264 gallons of fresh water, has 12 kilowatts of solar power and three air conditioning systems. Geez, skimp on the cooling, why don't you?

At the current conversion rate, the Performance costs about $1.7 million. Hey, that's about what it costs for a fixer-upper near Roadshow HQ in San Francisco. Hang on while I call my agent. 

How to build the ultimate off-the-grid RV? Start with a Ford F-750 in King Ranch trim with a 6.7-liter V8 turbodiesel engine and add money. Lots and lots of money. 

The EarthRoamer XV-HD can carry 250 gallons of fresh water and has enough batteries to store 20,000 watt hours of power generated from the solar panels. 

At 35 feet long, the breakover angle isn't that great, but an approach angle of 46 degrees makes for some good hill climbing. Now, if only I had $1.5 million dollars. 

A less expensive option can be had from Global Expedition Vehicles. The 14-foot camper is built on a Ford F-550 chassis and starts at $179,000, plus the price of the truck. And hey, it's called the Turtle.

From looking at the clean design inside, you'd never guess the outside can be fitted with beadlock wheels, a 6-inch lift, a winch and a heavy-duty bumper with an LED light bar. 

The Turtle XL also gets 45 gallons of fresh water, solar power and an optional cold-weather package with a 28,000-BTU heater. Heck, there is even room for a queen-size bed. 

Let's face it, Airstreams are cool. And the Globetrotter, starting at $106,900, is probably the coolest retro-modern trailer out there. 

The kitchen features a stainless-steel three-burner gas stove and a convection microwave oven. 

The Globetrotter is 28 feet long and has a gross vehicle weight rating of 7,600 pounds, so you'll need a heavy-duty truck to tow it. 

If you want that Airstream look in a smaller, lighter-weight package, check out the closely related Bowlus Road Chief. It tips the scales at a mere 3,200 pounds (GVWR), which means you can apparently tow it with a Bentley Bentayga. 

The Bowlus may be small, but it makes good use of its tiny space, with an easy-to-convert dining and living room area. 

The Road Chief Limited Edition, with lithium-ion phosphate batteries that can power the trailer for a week completely off the grid, starts at $219,000.

When it comes to full-size RVs, it's tough to beat a Featherlite. For you folks who have $2.26 million just laying around, perhaps you'd be interested in the Vantare Prevost. 

Luxury abounds in this RV, with a full-size stacked washer and dryer, 60-inch 4K HDTV inside -- with Apple TV and an Xbox, of course -- heated floors and an exterior entertainment area with a fridge, ice maker and built-in blender. 

Triple slides make the Vantare even bigger and there is enough room for two, yes, two bathrooms. What a world!

The weirdest-looking luxury RV has to be the Marchi Mobile. Full name: Marchi Mobile EleMMent Palazzo Superior. Full price tag: $3 million.

Sure, its 732 square feet of living space looks pretty sparse, but the website claims that "one of the most outstanding features is a 4-meter couch within reach of a bar, a wine cabinet and an icemaker, not to mention a large TV screen across the room." 

But it's not what's inside that matters. The Marchi Mobile comes with a freaking roof deck. The pop-up deck features integrated lounge furniture and a heated floor. I just can't, y'all. 

While Marathon Coaches start at $1.8 million, this 45-foot coach with four slides goes for a cool $2.36 million. 

There's a fireplace, a heated porcelain floor and all the leather you could ever want, plus a 55,000-BTU heater and four 15,000-BTU air conditioners. 

The bed is adjustable for optimal at-rest viewing of the 55-inch curved 4K LED television.