We aren't full-timers, but we did want a rig with a dedicated bedroom that didn't require constructing the bed at night and taking it apart again the next morning. The shortest we found, back in 2010, was a 2002 32' Georgetown. We were in the used marketplace with a top $ limit and found a nice 8-year old 32' rig for a good price.
I'm sure there are others out there of similar configuration that aren't too long.
BTW, we gave up the lifestyle last fall due to the rapidly rising costs. When you're dipping into your IRA to fund an RV trip, that's time to rethink things!