If you are willing to travel, in California flatbeds and especially service body sell very cheap.
About 4 years ago I sold my 2001 F250 4WD supercab with 7' custom flatbed for $4300 and took me like 6 months to find a buyer.
I made the 7.3l engine bone-dry, but the truck had like 320k miles, still running perfect.
Had 2 of 7.3 and seem new orings on oil cooler + coolant tank have to be replaced every few years.
Other than that (sometimes intercooler boots) really workhorses.
I was thinking about pop-up as 2nd camper for fast trips when I go alone, but for me RV has to have toilet and some water.
Those pop-ups that have them cost more than big campers.
That beside the worry about canvas cracks.