We have a 1987 Jayco Designer 5th wheel that has developed serious leaks and soft spots in the roof. Last year I took some of the ceiling panels down and noticed some of the 2x3 trusses were soft ( damage is in the rear of the trailer). My question is how big a job is this to complete and how many hours will it take? I'm fairly handy having built our family room and remodeled our bathroom, but I've never tackled work on an RV. Looks to my like the aluminum roof will have to be rolled back, roof truesser replaced and new ceiling panels installed. Any advise will be appreciated. Thanks.