Sometimes a used RV can be a great buy. Used RVs have already suffered the brunt of depreciation, many are only lightly used for a good price, and you will more than likely have an affordable monthly payment. But, on the other hand a used RV could be a disaster if you don’t know what to look for.
Read Mark Polk’s article on what you need to know before you buy: https://rv101withmarkpolk.com/2020/03/16/buying-a-used-rv-rv-101-pro-tips-before-you-buy/