Our only experience is with the MH in my signature. I am satisfied, particularly with service and parts (has an encounter with a post and the rear corner). They had body parts in stock for a (at the time) 10 year old MH.
It sounds like your plan is to take a trip somewhere and then work camp there for a while. A gasser would be fine for that without spending the extra money for a diesel and air suspension (neither do anything for you when parked).
Take your time looking---------see if you can find one that has not only been maintained well but has been garaged when not in use. They are out there.
By the way, if our MH were totaled, I would look for a 2006 or newer Winny/Itasca 35U or 35L. Great floor plan for 2 people and easy to maneuver in a city or RV park.