We were facing the same issue. We wanted to do a few vacation and weekend trips before retirement to see if we liked it and also to get a list of the things we'd need in a motorhome to do a six month trip.
I looked at renting but for what I would pay to rent I could buy a 20 year old gasser and use that for a couple of years then resell it.
So that's what we did. We got a 95 P30 chassis 28 foot class A and I put about $5k into getting it fixed up. I got more than what I paid for it when I sold it 2 years later, so 2 years of ownership cost me about $5k.