Your video doesn't display, it says it's "private."
Clicky.I'm also always up for a challenge, and the saving grace on this project is it has an "all aluminum roof" (make 100% sure first.) But, not being able to see how bad the roof moves (or your interpretation of it) is a real show stopper.
If the roof is moving it is telling me that the structure is unsound and you will have to do a complete tear apart and rebuild before it can move. Now if all you need is a hunting shack, then just doing the roof repair is still a good possibility