I have rebuilt around 10 "vintage trailers" and while I made a little money it is a nice hobby for retirement. To do what you want to do will cost at least a few thousand dollars (+) and that is if you do all the work yourself. I get most of my parts from "vintage trailer supply" and a lot of searching on Ebay.
Right now I'm doing a 1970 Scotty from frame up and I have $2700.00 in it already, and still have the skin to put on and paint. I also have a 1978 Scotty waiting in the shadows that I will start in the spring. Final advice, if you do decide to tackle it, take a thousand+ pictures. This time of year, there are a lot of cheap trailers in fair condition on Craigslist. Good Luck! Let us know what you decide.