I had a 2013 Thor 30.1. I had several problems that you might run into. I had an overhead bed that would come down just fine but had a lot of trouble getting it to go all the way back up. They use magnets to hold the bed up when when driving. The magnets were not strong enough to hold the bed in place. I had it adjusted several times. I finally made an appointment at Thor in Indiana and they added several more very strong magnets and that fixed it. I also had a lot of trouble with drawers, they were always coming apart after a long drive.
I agree with the one person that said the Ford chassis was just fine. I never had a Ford problem. I think I had a lemon, so I traded it in for a Itasca diesel pusher. Had the Itasca two years and no problems.