If your brother and you are going to tour the west, how much stuff are you planning to take? Will you tow? Class B & C RVs have weight limitations depending on the chassis underpinning the rig. One of the problems with the Transit chassis is it's very modest Occupant & Cargo Carrying Capacity (OCCC). In other words, at this point it can't safely carry much in the way of water, food, clothes, and stuff.
You might want to consider looking at a model built on a Ford E450 chassis, that is still relatively short, like 24 feet. A new E450 chassis has a GVWR of 14500 pounds, although some of the older ones carry less. This set up currently offers one of the highest carrying capacities around (depending on manufacturer).
Good luck with your search.
