Mr. Mercat and I have met some of them. They have free medical care, practically free room and board and seem generally content.
My parents were these “poor homeless”. They sold their home, auctioned off most of their possessions and spent 12 years traveling up through every Province in Canada, every state in the USA. They wintered along the coast in Texas and planned for the next summer to hit Habitat for Humanity builds, helped any Christian denomination build or remodel their church.
The builds allowed them to not only get free parking and utilities; it also fed them. For just 2 days a week, they got free meals, free hookups and got to work with others like them. There are groups of people just like them.
When they realized they could no longer be nomads; they sold their beloved rig and moved into Assisted Living.
Not all that wander are lost. Some are EXACTLY where they want to be.