I actually have the F-350 and I believe this cab size is considered the extended cab. There used to be 3 foldable seats in the rear with plenty of room back there but I removed the seats entirely a while back and built a rear seat delete setup to accommodate more storage since my wife and I don’t have kids. Before removing the seats I would say that there would have been plenty of room to accommodate two 10 y/o very comfortably. I can’t find pictures on my phone from before removing the seats but have included some shots with the seats removed in case that is helpful.
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I am keeping both the truck and the tray so I don’t have an asking price for the whole setup but if it is helpful I spent about $130k (~60k for camper and ~$13k for flatbed) in total to get the full setup you see here. The truck has just about everything done to it that you could imagine down to air lockers and regear, and I had to outsource a lot of work such as all the metal fab work and the bigger mechanical upgrades. If you were to build this setup yourself (no outsourcing for labor) I would imagine you could get away with spending about $105-110k.
Sorry if there was any confusion about what was actually for sale here and hopefully this info is helpful for you to be able to find or build your perfect setup for the right price.
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