"Extreme RVs" features million dollar mega-mansions on wheels with incredible designs and luxurious interiors that put most real homes to shame. There are a handful of designers and craftsmen around the United States responsible for these one-of-a-kind machines – big, small or crazy. From design drawings and computer renderings to fabrication and interior build outs, these shops will cut every piece of metal, turn every bolt and spray gallons of paint in order to create these outrageous rolling mansions, vintage restorations and crazy camping vehicles. As with every custom vehicle build, the drama will be in keeping the budget in line and finishing the project on time.