I have to chime in here......our stick built is a 1997. We are the only owners and it's only traveled about 5-6 thousand miles but it's in great shape. The things that are wrong with it are the awning
is showing wear (we have used it everytrip and leave it up no matter what the weather), there is surface rust in a few spots on the frame and it's really dirty on the outside. Oh yeah and someone stole out water heater cover door.
Not all stick builts are equal and not many log 100,000 miles. That's a bunch!
Donna, I'd pull the windows then paint
the trailer and reinstall them. Windows are really no big deal to do, not hard, just labor intensive (all that icky scraping). We've done them in every used RV we've bought.