Bonnie ... just thinking the longevity of most any trailer is how it’s stored ... I currently own 3 camper trailers , an ultralight Jayco 20’ , not light @ 4000lb, requires constant inspection , cleaning and $$$$ maintenance Living outside ... (POS) Nevermore !!!
An all Steel Cargo trailer ... pretty
bulletproof really ... small ,Stout and a little heavy ... lives outside as yet unaffected over many years ...
And the Foamie , which has sat outside pretty much since it’s been built , and is yet unaffected by the environment in any way ... (nothing to Rot )
I had built a wooden TD originally , and stored outside , immediately showed signs of plywood splitting on the curved roof and water entry (ants too) , and required an entire repaint after the first year

... It was almost 5 times the price of my Foamie , and lots heavier ... only slightly too big to fit in my garage , where it would have held up much better ... Now had I known then about putting a skin over the plywood (canvas) I think any of those problems would have been eliminated entirely ...
Best keep anything you really like in a Garage ...
