I believe it's largely a matter of personal opinion, and mine may be no more valid than anyone elses.
2 main points,
I do believe an "owner" takes more care in their actions than a "renter"
and while the agency may follow maintenance schedules better than most, they still dont control how and where its driven.
High miles are high miles, that rental unit has apparently had 10-20 years of use, wear and tear put on it in three to four years.
I just bought a 10 year old class A, with 25000 miles for just over $40k. Everything works, and it was stored under cover, all maintenance records were with it and it had two year old tires. I'd do it again.
Since you want small, look a little older at the "cruiser" RV's. Phoenix and BT cruisers have great reputations and are still easy to drive. Lines from Jayco, Winnie and Forest River are all also seen as better choices by most folks than the entry level Thors.
Not knowing your price range, here are some small $30 to $50 units.
rv trader
