I have a 1965 single wide with a large add-on. On my own land, not in a park. At minimum I need to have a honest opinion on what needs to be done. It's almost flat with a rolled on. On the add-on it has a dip in the middle, but not sure how strong the walls are. The main roof I replaced after heavy leakage about 10 years ago, I knew only enough to make it adequate. I am not interested in financing unless its zero interest (don't laugh) Because I may have enough saved depending on the total cost.