Ditto on the roof inspection. Also pair that with a careful look at the caulking around the windows and door. It dries out over time and allows water to get inside the walls and ruin the structure. A quick fix is applying a bead of silicone after a thorough cleaning but it's better to take the time to remove the window (not difficult, just time consuming) and installing new rope caulk. That preferred way will fix things for close to 10 years as opposed to annual caulking on the outside. Also be sure to repack the wheel bearings. This also lets you look at the brake lining. The campers that the owners keep ahead of leaks are the ones you see that look like new inside after 30 years. Water intrusion is the death of TTs. Bad caulking is one of those things that's not obvious just by looking. Assume that if the TT is over 10 years old it needs it done. Any unit over 10 should be CAREFULLY examined as the damage really is difficult to determine as it is hidden in the walls.
