That's two or three apartment blocks, so maybe 200-500 apartments? Don't have exact figures at hand. The municipally owned rental housing (available to anyone)

That's two or three apartment blocks, so maybe 200-500 apartments? Don't have exact figures at hand. The municipally owned rental housing (available to anyone) which you talk about, together with different forms of social support help people from falling into homelessness in the first place. Those few apartment blocks used for the "housing first" scheme are the help people out of homelessness. These houses are not normal rental apartments, and have social workers present, etc. These are not available for rent for anyone, and no-one would voluntarily choose to live in one of these if given alternatives. They are somewhere between a shelter and a normal apartment.