The wife and I have about five years until we sell everything we own, and just go... and never come back. Already liquidating material possessions. Bought a 28' travel trailer in 2013, and we are practicing a lot. Heading out for 4 weeks this Saturday. Going from NJ down to FL and back. Stopping lots on the way there and back. We pull it will a RAM 1500. 10k tow capacity, 7600 lb trailer fully loaded. 5600 lb dry. So I'm good there. For now. Only hard part now is deciding to go with a 5th wheel and a bigger diesel pickup, or a diesel pusher.
Get something you can be comfortable with driving secondary US highways.
These are usually in far better condition than the interstates and much more interesting to drive.
If you can get off the interstates you will find that RVing is much more than just camping somewhere