straight up A team that ambulance, paint it all black, red stripe, and inside take it to the bare (to reduce weight and shit) and then put up plywood or something of that sort of material, then build a wall of cabinents on one side of it, about a foot deep or so, after that you can store airbeds in there, story your microwave, minifridge, sound system, i wouldnt deal with a tv and game system unless your absoluetly dying for that, have money set aside so you can bunk at a motel 8 or something when you get sick of it, astro turf the top for sure, just make sure its strong enough for a few people, then i would say throw in a 360 (for using at the motel 8's) throw on a surf board rack, but mount it on the side to make the top flat and super chill, also i would suggest getn like a kayak or something and mount that on the other side, if you dont do these, get a trailer, cheap $500 new for a 5x7 trailer at tractor supply and there are cheaper ones, because in the trailer you could story your cloths, and everything, and you could quiet possiably make it like a coverd snowmobile trailer, unless you found a covered snowmobile trailer, because then you could store you shit with out worrying about theft or water damage. just make the inside spacious and have few bean bags instead of a couch, either way you cuold pile them into a trailer when not in use, your gonna want like atleast $3000 for expenses and gas, cause these things arnt gonna be cheap and your mpg is gonna blow!