Years ago Apollo made one called the "All Seasons" Not sure of the class. but it was a traditional Motor home, save for the fact that it wore 44" Tires, was 4 Wheel drive, could tow 8,000 pounds up hill on fresh plowed ground and was built to military specifications.
I think they made 3 or 4 of them, One civilian the rest military..
This was one motor home in which I might well recommend an OPTIMA battery (Any of you who've read my battery posts know I don't care for Optima due to the wasted space issue but on this ride.. Well you need a battery that can "Take a licking" as it were.. IE: Optima)