I think I would frame the question in a bit of a different light. I would ask myself these question(s)
1) at what point mileage wise, would you be uncomfortable going on a 5K trip through say the Arizona desert and back.
2) not only talking about the engine, but the tranny rear-end etc
3) As the average MH use is around 6K a year, how many years do you want to own it?
4) because when you factor in the above, it really changes the equation
in one direction or another. depending on what you want to do
For me the answers are as follows
1) around 160K
2) same
3) 25 years, so 6 x 25 =150+ 110, already on it = 260 K Way out of my comfort zone ( others will say different, I say cool, but in my life experience, 160- 170K I get a bit spooky)
My opinion, buy it once, never buy it again, the key is how long do you want to own it, what is your comfort zone on mileage on long trips
We bought 4 years old, 5K on it, now 13 years later 65K. It will run us till we drop. 25 years X 6 = 150 + 5 =155k
So I suggest end of the day, although we paid more, than a high mileage unit, the long term cost and peace of mind will work out in our favor Remember taxes, new units more expensive and so on
Buy it once buy it right and keep it up, if you want it long term. That is my thought