The day we bought our 4500, it was nice weather during the purchase. I directly asked the man, "Does it leak?" Answer: "Not as far as I know." Good enough. Towed it home. It rained that same day. We were hanging-out inside our new camper in the rain. There was water everywhere. There is no way you could ever be inside this camper in the slightest
rain and not know
that it leaked. That guy will get his someday. You can't live your life deceiving people like that and be happy, but I digress...
For a long time after that I was pretty reluctant to fix-up the new camper. I did know that it would need some
work when I bought it, but not that it would be unusable until I made it waterproof. I felt like it would just never not leak or be good enough to camp in. It was in our garage "being worked on" for months, slowly, here and there little things got fixed, but you know how it is when you just can't see the finish line.
It finally got to the point where it could sit in the rain. I had to remove and repair the rear window, replace two panes of glass, re-hang the door and just generally seal it up all around. I think there are still two little drip leaks
somewhere. After it rains hard, you can find two tiny wet spots at the rear wall on each bench.
So now it's finally usable for camping. I still need to work-out the water tank (large hole), but I wish I had known then what I know now. I would have been much more motivated and would probably have been done long ago. There is a finish line. These trailers are very, very fixable. The effort is rewarded greatly.