One setup I've seen was a fairly beefy class "A" rig used as living space. It towed a fairly large trailer. In the trailer was a car for the missus, and a Harley trike for the DH. Once they got to a campsite (it was dry camping, so they had plenty of space), the cars came out, and the trailer was made into an office.
If I recall right, the trailer had a 25 gallon gasoline tank coupled with a fuel station and an Onan generator.
If the OP has stuff to sell, perhaps this might be the ticket? The main rig a MH, and towing an enclosed cargo trailer with a toad inside as well as their merchandise. The trailer would have a built in A/C coupled with a built in gasoline tank and genset, ensuring that the stuff inside stayed cool, no matter where they were. Then, when at a destination, out comes the toad and the trailer now becomes the shop and office.
