You laugh but there is a new group of homeless coming. They are currently called boomers.
I spend quite a few nights camping in state parks. Many are full and reservations are required.
As I travel the interstates I see on the outskirts of most large cities RV dealers with thousands of rigs waiting to be sold to Boomers getting ready to retire and then hit the road. The really big rigs are extremely expensive so the boomers sell their houses and live in the RV.
Once that irrevocable transition is made, the problem becomes where to stay. It is real...... not imagined.
State Parks are going to need to grow to provide space for this coming horde.
I don’t doubt you.
My Aunt & Uncle did that for a number of years. Then the glamor of ‘Life On The Road’ wore off and they bought a house, again.