We would like to sell the ranch and move to a house of no more than 2000 sq ft with low or minimal maintenance that would also provide a place to park our 5th wheel...
Boy I've been there done that and finding a house that allowed the RV was a real pain. It will not be an easy task.
You will have to look for homes with "NO" HOA's if you want to park the RV on your property. And what I also found was the real estate agents will say no it doesn't have an HOA when with further research showed the house did. So don't put stock in what the real estate agent says.:(
So my advice is to be VERY VERY prudent before you buy a house that it does NOT have an HOA. Make it a contingency in your offer that they either provide you proof it does not have an HOA and/or provide you with a copy of it if it does.
Sadly You will find that most homes in subdivision's will not allow your RV. Buying property just outside a town with a couple of acres which usually do not have HOA's and then hiring someone to do your maintenance would probably be the best and easiest route to go. Good Luck finding just the right new home for you and your RV! :C