The roof vent does look like it had some water intrusion, most likely due to failed caulking around where the base and roof seam together. Not a major undertaking to correct the water leak, but it is a pretty in depth job to tear out the ceiling and fix any damage that's in there.
The exterior...well, that's nothing that some love from a pressure washer and scrub brush won't cure, and then go from there. Might not be a bad idea to reseal things while you're at it.
Me, I'd take a day, go up there and give it a thorough once over, and if nothing is really terrible spend an afternoon cleaning, inspecting and regreasing the bearings, make sure the brakes work, and drag it home and go from there.
Good checklist to work with-this is intended for checking over a new RV at the dealer, but it's a great working list to go from one end to the other-
http://www.thumperta...693#post4764693
That would cost you at most $300 in parts, and a day's fiddling around.
That frame doesn't look bad at all, merely surface rust. If anything, I'd be worried about the condition of the rubbers in the shackles due to age and dry rot. They're not going to make the thing come apart on the road, but it may cause an alignment or tracking issue if they're really bad.
I mean, when you stop and think about it, it really all depends on what you want. Do you want luxury with every amenity, or are you looking for something simply to sleep in where the spiders and snakes don't climb into bed with you and the coyotes aren't snuffling around your tent pegs at night?
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