You may find one of these for sale in the $50,000 US range. We have a 2012 Roadtrek 190 Ranger. It has just under 160,000 kms (100,000 miles), it has been to two of Canada’s three oceans and many points in between. We are still on our original brakes. From day one, it has had zero control or crosswind problems. Over the past 12 years, there has been no need to replace any of the RT’s “camper related" equipment. Its combination of a chevy 6.0 litre gas motor and a 6 speed Allison clone transmission gives good gas mileage and power. The electric system has been rock solid. It came with a 12,500 watt inverter. It has a two way (electric only) 2.5 gal hot water heater, which eliminates the risk of propane related equipment breakdown. Two six volt AGM batteries provide 3+ days of electricity between charges, note however that we almost never use our AC. You’d need a very large power bank to run AC offline.
Mobilelife RV Centre in Kitchener Ontario sold Roadtreks for around 30 years, and continue to service the older models (that they sold). We have had a very positive experience with their service. About 10 years ago, Mobilelife bought a a large quantity of RT parts (when the company went under).
You could call their Parts Department with your parts question.