Re: I think I found a feasible solution...
Good point. I will doublecheck the measures and make sure the 7000 pound figure is -after- the upfit... I see it on the Ford site as before, so this is significant.
I always have the alternative of having bed space in the cargo trailer that I plan to buy for storage and to hold the solar panels. That is going to have an RV-style door on the side, and the drop-down gate in the back, mainly intended for the renaissance faires, but also useful for a bug-out run. Buying one of those with an air conditioner would be good enough, since when the family member is with me, we will be at FHU sites as opposed to my style of dry camping.
I did look at a lot of class "C"s. There are no LTV or PW dealers within reasonable driving distance. For a short "C", most were 24 foot Sprinter based models, and the RV dealerships would be happy to special-order an E-350/E-450 model... but with far less of a discount. One dealership about 300 miles from where I was had a lot of fairly low priced E-350 "C"s, but I am not a fan of rubber roofs. Of course, there was the fact that a "C" is an obvious motorhome, and there was a noticeable fatigue factor with a "C" that wasn't present with a "B".