We sold our MH and bought (not borrowed) a new TT in January. I have had to reseal the front and rear roof seams, marker lights, and a few other places. If I had left the TT out in the weather for 2-3 years as-is from the factory, it would be in poor shape I think. (Mine won't be rotted out hopefully, but it will likely be beat up from my kids as they grow up LOL)
So for anyone waiting for the great "unloading" of cheap RV's in 2-3 years, you still may be getting a rotted out mess
Unless, of course, the thousands of new RV owners are all carefully checking the seals and maintaining straight from the factory
But then again, this is probably typical for the used RV market.