vintage terry travel trailer help!!!

WHen I got the trailer, the roof was sagging, patched with tar and silicon, and kept under a tart for the last two owners. The inside was pretty dry, since the tarp had gone on early, rather than too late. There is a local sheet metal shop in Roanoke, B+M, with a bunch of old guys interested in problem solving, and I took the trailer there, and asked about metal roof. I had priced out a rubber roof at around $1500, but really wanted to make it stronger, as well as water proof. The had the sheet metal there, a single sheet of .040 aluminum, and together we planned out the fold over and rivet on job. I hope that this makes the roof both very strong, in terms of flying off, and very water tight, with a good over lap over the existing sides, as well as a strip of butyl rubber under the seam, squished out by the rivets. The roof is also secured by fan and the vent, as well as the fridge vent and the tank vent, both of which are thick metal covers that screw down through the roof into the wood of the trailer. I think it will last, and stay dry.