Ill check the tongue and see if I can jack it up and get the tires off to see what's underneath. Its got two sky light type openings on the roof that are broken out, and the floors on the inside are rotted from the leaking from these holes but I covered them when i was there so they should be good. Hence why I think I should stick build. But I didn't think about the weight because I gathered up all the old cedar 2x6 2x8 4x8s to use to frame. I was thinking they would be stronger and last longer.