Issues with Evergreen TTs?

I have owned and maintained two campers before my Everlite both others had to have water damage repair by the time you see a leak there is rot. I think that you don't see any old travel trailers at parks because they all have been junked by 15 years old. Mine has no wood 1115 in production run great trailers company has always been great to work with and have listened if I had a problem. I think dealers can't service everlites because they are made so different