How handy are you repairing minor items. Also find a mobile mechanic and have him become your friend. If buying pre owned have it inspected by a mechanic or someone that has no interest in the vehicle. The overhead bunks can be a issue with water leaking in, make sure that's secure.They all get 8 miles per gallon unless you get a Mb diesel which has it's own set of issues. I owner a itasca Cambria for 6 years ,pre owned, was pleased with it. The Ford V-10 is bullet proof if maintained properly. Any mechanic worth his salt can repair it.
friends have owned or still own RV's costing 500 K and up and yes, they still have issues. Mainly with wiring, fuses and where they are located.