Both Mocoondo, and Ichambod are big fans of ex-rentals. Icamabod has not chimed in yet, but I am sure he will.
Both are good guys, and make valid points. The average RV use is, I believe 5 to 6 k a year. And most folks don't own them more than 10 years or so.
So if you start with one at 100k, 10 years later you are at 160k. (V-10 still going strong at that point, one would think)
They often state the house part will fall apart long before the drive train. I agree, but the other part of that is the higher the milage, one would guess the more use on the house internal systems, heater, fridge etc. So one would think they would be prone to fail earlier, than a low use unit.
I think I am an unusual buyer, in that I plan to keep stuff for 20 to 25 years.
So in my case I want to start with a 3 to 5 year old rig with no more that 30K.
So say 20 years @ 6K per year equals 120K, plus the orignal 30 150K.
I bought with 5k 4 years old 9 years ago. Now at 55K, no house faliures, no drive train issues.
In my mind the biggest factor is how long do you want to keep it? If many many years in my opinion go 3 to 5 years old with low miliage.
But if you are sort of looking for a "starter MH" I think an ex-rental could be a valid choice.