[Renting is a good idea to find out what you like and don't like about an RV trip. My wife and I had taken a trip via rental a few years before buying our RV, so we had an idea of what we were getting into. Financially, you need to use your RV often if you buy it, or else it doesn't make sense to purchase outright.]
We own a 30ft fithwheel and a f250 diesel to pull it. We never rented before we bought and that was mainly because our parents and friends have them, so we have always been around them and knew what to expect. Wev'e only used it on 2 trips where we have gone caching but it works great.
Financially, you can count it as a second home if it is equipped with certain things, such as a bathroom.
Last summer my brother and my aunt rented rvs in Colorado. They had a few problems but overall it was enjoyable.
Just be prepared and don't expect everything to be perfect, because it probably won't be.