What we have, a 24' C on a heavier duty E450 is the ultimate compromise. It does nothing great but isn't really terrible at anything either. A small house on a 14,500 GVW chassis makes for more than 4,000 lbs of NCC. We have 44 gallons of water, and 30 gallons each of black and gray capacity. Makes for the ability to comfortably boondock up to a week if just the two of us. With a 158" wheelbase, we can back into a parking spot, overhang the rear and not take up any more room than a shortbed crew cab pick up. There still are 3 sleeping positions (corner and overhead bunk queens and the dinette bed. We've now had it for 8 years, and intend to replace it in 4, and keep coming up with another of the same exact unit, except maybe with a dinette slide this next time around.
We have just started hauling around local transportation, and in a similar minimalist compromise, I bought a 50cc scooter that still can accommodate riding 2-up. My wife is still getting used to the idea, and riding around on the back of it, but does admit it serves the basic purpose well.