after looking at these trucks for a while and not buying anything yet, here are a few points
1) The F250 or 2500 size truck seems to be the best compromise of cost of maintenance (costs less) with strength and capability of vehicle. Can handle the weight of most camper inserts.
2) Dodge-Chevy-GMC or Ford and their cousins in 4x4? Pick your poison kid. But get a transmission cooler. Cant believe all these trucks that are used for towing or heavy hailing that do not have a transmission cooler. Dodge seems to be slightly favored, though Ford is popular. Would rather get a 4x4 and not need it, than the other way around.
3) Diesel or Gasoline? Well you will buy high mileage vehicle, and Diesel gets twice the longevity, at sometimes twice the cost for maintenance. Fix it up while you are home based first, and then you are likely going to have good longevity.
4) Manual or Automatic? fixing a manual transmission is not that hard. Fixing an automatic transmission requires replacing the whole transmission. Look closely at the history on some of these truck transmission designs. Would think there is a design fix in any manual transmission problem.
5) Look for the long bed 8 foot long. Cant believe that many would buy a six foot bed if they can get two extra feet in a long bed.
6) Where to search? You can look on autotrader.com and you might be looking nationally. Good used trucks are searched for and found and sold fast. Be ready to make an offer.
7) Projected MPG? Think 10 mpg and anything better is a bonus. It will be that bad. Nothing like the car you used to have.