The insanely pricey features of luxury motorhomes

From the Big Mac to the Big Gulp, Americans like their purchases to come in large portions. That's true for motorhomes as well as snack foods.

No longer mere campers containing a few bunk beds and a bath, modern mobile homes offer features right out of buyers' dreams. From rooftop hot tubs to onboard garages, today's high-end homes on wheels are built for the ultra-rich.

These 10 insane upgrades are just some of the many options available on high-end luxury vehicles.