Great job - great hobby truck, and all for less than the cost of an equivalent sized boat. (Might mention that to the Mrs.) Speaking of boats, you might find some of the stuff you are looking for - stoves, fridges, sink and water tanks, etc., at a good sized yachting supply house, even down to slosh-proof chemical toilets.
If I can also suggest - you might also want to sturdily mount a bench seat from a van, complete with seat belts, for folks who ride in the back. Hit a curb or chuckhole at the wrong time, or - God forbid - an accident.........
soupbone