OK Wagonman....now you're talking!! I've had this same idea for years...(but I'm working on my own crazy dream right now...and it's very parallel in nature!)
anyways...
I thought about using a furniture trailer, like the moving companies use, as they have ALOT more room then the basic van trailer you have in the picture. Furniture trailers are built for maximum capacity, as furniture is light compared to most cargo, so you can pack so much more stuff into one over a freight van...especially as the furniture van has the belly that a freight trailer lacks.
http://upload.wikimedia.org/wikiped...nes_moving_van_Superior_Township_Michigan.JPG
and actually...as you can see, these trailers often have racks built under them for even more stowage. You could put holding tanks, or lockers for bicycles and lawn junk under there. (I thought about having a deck that could slide out from underneith once you were parked and situated. Slide it out into place, set some sort of adjustable stabilizing legs under it, set and pin the stairs and railings into their respective holes, and you're in business! Naturally, there'd be a nice man-door in the side of the trailer too. Oh....and don't forget to set up your awning over it too. Once these chores are done, then the deck chairs and BBQ are brought out and put to work...doing their all-important jobs!!)
Do you know that these furniture vans also have HARDWOOD FLOORS in 'em??? I've known household goods movers that polish these floors!!
Another thing is that there are trailers that are fully insulated, for hauling perishables in 'em, and even have heater/refrigeration units on them too. Unfortunately, though, these are nearly all in the freight van style. There are some furniture vans that come like this, but they're kinda rare. (never hurts to look for one though.
The way I figured, though, is since I'm already gonna be framing up walls, building cabinets, and plumbing and wiring, then insulating is no biggie. You'd be building it as you would any other house-type structure...except that the outside is already done!
I'd try and get a 48 or 53 footer. I'd have my bedroom up front in the nose deck, much like a 5th wheel camper is. Then I'd have a HUGE open area for the living room area, then my kitchen would be built on a wall that goes from side to side, and the bathroom would be behind that.
OK, (here's the cool part)...then I'd have the last 16 feet set up as my mobile garage!! You could stick a small car in there, and have a small boat suspended about that! Hang bicycles and kayaks on the walls...whatever!!
Consider this...how many large contracting companies use old semi trailers for mobile offices.......SAME THING!! (only nicer!!)
Too bad I haven't put much thought into this....huh!!?