We've run the gamut... from gas motorhomes to diesel pushers to a Class B to a toy hauler and now in a 5th wheel. They all have their appeal and best usage. If you are going to be moving frequently, it's hard to beat a motorhome - raise the jacks, pull in the slides, unplug and you are ready to roll. Realistically, you will want some kind of "toad", a tow vehicle to haul behind. It is a pain in the butt having to unhook and even more of a pain to try to find someplace convenient to park a motorhome (unless it's a small Class B). That's not a drawback of the Class A motorhome, just part of enjoying it.
A travel trailer is my least favorite type of RV, but it is generally the lest expensive entry into that lifestyle. It is not as stable as a 5th wheel... ask anyone who's towed one in big winds and with passing BIG trucks and busses. However, they are lighter. Less storage than a motorhome or a 5th wheel.
We decided on the 5th wheel this time around, because we are now staying in one place more time than we used to. These have great livability, but you definitely need a serious truck, depending on the size/weight. The drawback here is size and weight. You can get "low profile" 5th wheels, but they have less than stand-up height in the bedroom. Ours is over 13 feet tall. With the slides out, it's over 14 feet wide... but, it is REALLY comfortable. Lots of storage, leather recliners, a fireplace, surround sound, etc, etc. It takes a bit more to set up than a motorhome - maybe 15 minutes compared to 10.
At the top of the heap is the diesel pusher coaches. Get in the 40 foot range, and you have all the amenities, plus a bunch of stuff you didn't even know you need. :wink: Our last couple coaches rode like they were on rails. Great view through the windshield, you absolutely feel like you own the road. The downside: they are expensive and they depreciate. You have a big diesel motor and chassis that isn't getting used if the coach sits or if you travel to one place and stay awhile.
So, a quick view of the pros and cons from several decades of RVing. LOTS of options out there, and I really recommend that you do your homework... just like boats, there are RVs that are a lot of fluff and little substance. It's easy to have your head turned by amenities that have nothing to do with how the RV was built. If you want something that holds its value, look towards the manufacturers that build them for "full time use" (not many of those). If your use will be occasional weekends and a couple weeks in the summer, the construction may not seem to be significant... but you will feel the difference and really notice it on the resale.
Hope that gets you started.
Best wishes,
Jim B.