If you're buying new and have no interest in typical maintenance or are physically unable to do any repairs, the dealer you choose and the quality of the service Dept. will be important. I can wander into a service garage and within 5 minutes assess the quality since I've worked in these environs. If you haven't ask the dealer's sales person and the manager about the service Dept. "How long does a typical warranty repair take?" may be a good question. Has the dealer had problems with a certain make or model? What models shine because the service Dept doesn't often see them? Asking the right questions and observation can save a lot of heartache going forward.
Good luck with your purchase. There seem to be brands that shine as durable. Others can advise on them. My Starcraft is 46 years old if that is any indicator.