A U-Haul to Wyoming will probably be pretty pricey, and the extra gas mileage hauling it will really add up. I seem to recall my old shell was about $500 brand new, but that was quite a few years ago. I've done the cross-country move with a pickup truck and a low profile fiberglass shell twice, and I gotta tell you -- not a lot fits in a pickup truck after you've stuck that thing on. I mostly ended up abandoning boxes and just stuffing things in nooks and crannies.

A taller camper-style aluminum shell will probably be more practical although uglier. (And he can use it to go camping at folks festival later!) I see old ones for sale on the street all the time, and some of the places that sell new also sell used. He might check RV dealerships -- they sell used campers sometimes.

And did he check eBay? There might be a local seller