I'm coming to accept the fact that I may need to buy a "naked" cargo van instead of a semi-insulated passenger van if I want to keep my options open. But I've also heard that if I don't insulate such a van, condensation will be raining down on my head every morning. (That statement may be climate-dependent: For what it's worth, I'll be vandwelling in central New Mexico most or all of the year.) I know it costs a lot more to have someone else do the installation, but I really don't want to mess with it myself. So...where would I look for the right kind of contractor to do this sort of work?