Went to the shop today with a retired RV tech (69 years old with over thirty years experience).
The axles are scored badly, but the bearings seemed to be okay. One broken spring clamp. The roof and a/c unit hail damage was very obvious, and it looks like the broken vents over the bathroom and kitchen area may have allowed water to enter causing the damage to the roof decking and leaking down inside the wall to cause some floor damage. The 'lugs' on the electrical system were arcing due to loose connections. This unit has been on the road for eight years, and has travelled over 70,000 miles.
As my retiree and the shop tech both said, "these mid-line fifth wheel units are usually operated two to six weeks per year by people who use them for a couple weeks vacation a year, not for someone to be putting over 10,000 miles a year and lived in almost full-time."
I knew there were a few things wrong with it, that's why I took it in. But I had no idea that THIS MUCH would be wrong with it.