RVs are a disaster as far as holding value - they depreciate rapidly. The higher end brands typically hold up better to wear and tear and have a certain cachet that makes them more desirable on the used market, but their value as a percentage of the original cost is little different. It's best to consider the price of the RV as rent rather than an investment. Find one that suits you and chose on the basis of that.
In my opinion the better motorhome brands are Newmar, Monaco, American Coach and Country Coach. Newmar and Monaco are full line manufacturers, so their upper end models are the best choices if the budget permits. Also consider a used Wanderlodge or Prevost bus conversion - an older one may be affordable and they are built like tanks. Among the trailers I would be looking at Carriage/Carrilite, Nuwa (Hitchhiker), Excel, and maybe a Montana or a Cardinal. Don't make that your short list, though. Look around and see what you like, then check back here for pros and cons.