Are you sure you want to go "Full Time"?
What experience do you have RV'ing" ?
From what we have learned by our own experiences and that of others, it takes a lot of adjusting for 2 people to live together in just a small space.
Do you both enjoy the same things? Like hiking, sight seeing, beaches, mountains?
It might be best to buy some sort of used RV of choice now and take some extended trips together to see if you like it. Then make up your mind if you really want to go full time.
We had been RV'ing for 28 years before we went full time. RV'ing to 49 States and most of Canada. In our case it's hard to say which one of us likes our life style the best. We try to trade points of interest so we both get some of what we want.
Happy to say 12 years later, we had a great day today.