I think for caulking on the trim and sides it's best to keep an eye on it and cut out and replace when it's separating around the edges. The roof is another issue. I wash mine two times a year. It doesn't take long. I inspect it really close and would use the proper sealants when needed. Back in the day our old 1991 Prowler had a metal roof. That was so easy to maintain.. These rubber roofs can have a leak so small you have a hard time finding it and it can hurt your feelings. Leak prevention is high priority stuff in my book.
