Congrats on you purchase and have fun with it.
I bought a 10 yr old MH over 3 years ago (no service records and it was a bank repo) and have had no issues until this year
-replaced the lift pump - but this was a known issue in using the "new" diesel which deteriorated some of the seals - replacement doesn't have the same seals -
- had the A/C repaired).
- replaced worn belts on the generator
I have done a cooling flush, oil/filter changes etc on a regular basis.
My total cost over 3 years is about $4K with more than half this year.
Tires were new (part of the deal) so I've got 3-4 years to save up for the next set.
Chris