We considered keeping our house when making the decision to full time. It had been paid off for years and wasn't a financial burden. In the end, we decided to sell.
Keeping the house would have been an anchor always holding us down to our previous town even while on the road. We would have been wondering what was taking place in our absence. It was something we didn't want to think about while trying to enjoy full timing.
The buyers wanted our house fully furnished so we didn't have the burden of getting rid of a bunch of stuff. We only kept things that couldn't be replaced. Photos, etc.
We had 12 PCS moves during my military career. Moving to a new area and buying a different house is nothing new. We'll do it again when we decide we've had enough of full timing. Traveling the country in the rv will give us a chance to experience many different areas before deciding where we'll settle again.