We just went through the same process. Good advise on here. Just a few thoughts. I've listed them in my order of importance.
1. Condition and history of the unit. Records, maintenance, repairs, and ownership history is most important when buying an older unit.
2. Get a floor plan you and the misses like.
3. Are you a tinkerer? I am always tinkering on my unit.
4. Allow adequate budgeting for insurance, repairs, and maintenance.
My personal checklist included a fiberglass top, side radiator, and tag axle. I like American because my father owned 2 and I am familiar with them. Based on his experiences of owning 7 motor homes, the last three being diesel pushers, I wanted those listed features. We looked at Monaco, Holiday Rambler, Beaver, Prevost conversions, etc. Found a nice Wanderlodge that we have been pleased with.
Good luck in your quest.
