At the end of last fall we purchased our first in a long time travel trailer, and the first that we will be towing anyplace. Previous trailers were parked on site in campground and never moved. Anyhow...
Consider hiring a mobile RV Tech to do an inspection on your TT. You could decide which, if any, repairs you will do yourself. And, you could get quotes from dealers for repairs you want to contract out. Plus, the RV Tech would probably give you estimates for the repairs if he/she does the work.