I always bu a new RV (no matter what type it is(, because I've looked at used ones and everyone I've looked at has had water intrusion issues somewhere and 96% of all units aree wood framed so water intrusion equals rot and mold and I'm not a fix it personj.
I've educated myself on where to look, what to look for and how to determine the extent of the internal damage without damaging anything.
Every used unit I've looked at in the past decade has had some intrusion issues....every one. All it takes is some basic knowledge of where the most likely points of water ingress are, a non-contact IR thermometer or a thermal imaging camera. .Water intrusion causes rot and mold and both produce heat so pinpointing it under wallboard (even freshly painted wallboard) is no big deal.
Why does it happen? Because owners never keep up on caulk and seals.
Why do you think there are so few really old RV's out there.. because they have all succumbed to rot and mold and are in landfills or did a bonfire out back...
I always buy new. I'm educated.
