Are you buying new or used? What's your price range? Are you going to full time, part time, or just vacation? I would hold off buying anything new at the moment as there are major supply chain issues and worsening quality than what already existed due to COVID employee constraints against demands to produce more units. Seen a few posts recently about issues with a new Tiffin which used to be a top tier brand. But they were bought by Thor and Winnie purchased the other top tier brand - Newmar. If buying used, expect to pay more because demand is higher there too. But back to your original question, just like anything else, you get what you pay for. Quality is bad in RV's but some are considerably better than others. We owned an entry level RV previously - an ACE - and while fun for weekend trips, the quality was poor and I never planned on keeping it more than a few years. I certainly wouldn't full time in it.
Jeff - 2023 FR Sunseeker 2400B MBS