We could do a lot of hotel renting for the price of a bigger pull rig and a trailer. That puller would be a must, we have a wannabe pickup now. A Ford Ranger.
Since there are just the two of us, something as simple as a teardrop would be adequate for simple runs. I'd love to build one, because I have the know-how and tools that would allow me to, but it would be project number 3,497.8 and scheduled for a few decades after I'm gone.
I used to work for Cariboo Campers, out of Brewster, Washington. They used 2x2 construction and came with a life time warranty against roof leaks. Every few years, someone would come up the Vantage, Washington, hill and the wind gust would flip their cab-over camper. Obviously, this was not your average leak problem, but we'd repair the damage and replace the top on our dime for the reputation.
Those campers were heavy as sin, but kept the truck in far better condition than any other camper would have.