To quote George Carlin. You will want a place for your Stuff. While Airstreams will meet your interior needs quite well there is very limited storage for the things you will want of the outdoors. Consider a pickup with some form of cap for the generator and the fishing gear.
As for the price/valve consideration I would look around the late 80s and early 90s. The vintage years often bring some serious reconstruction, the floor, with them.
Just mail a Coors to me.
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles