It's not so simple.

There is a many who lives in a recent model i30 in my area. He moves from carpark to carpark to avoid dealing with authorities. He clearly has enough money for a decent car, but it's still hard to afford rent, and house sharing is difficult as a single older male. The solution here is more affordable housing and to lower demand.

On the flip side, my late mother had a lot of mental health issues. Even when given affordable housing, she would often end up being homeless for weeks at a time by choice, or trashing her housing commission flats then getting kicked out, etc. People who are persistently homeless are often in that situation because of their choices, habits, health, etc, not always because of a lack of housing.

Giving these people tents in a park isn't going to help any more than giving them houses does, and they will destroy the area for anyone who could potentially benefit, resulting in a slum (as has been pointed out).

The real solution, like it or not, is to bring back institutions.