go look at you tube videos on rv refurbishment. I have watched some and they are pretty entertaining while showing what has been happening and expected future results. I did a partial rebuild on a TT I got for the kids when they went to softball tournements and it wasnt hard BUT I did not tear it all apart. The framing on front was pretty well trashed due to leaking clearance lights so ended up replacing a lot of the forward framing using cripples and stuff to support the existing framing. Never did get around to working in rear bedroom as I sold the things since the kids never did use. It can be fun AND frustrating, so go review the youtube stuff and enjoy.
