Well that is why the reasoning here is
1. "We already have lot of empty flats nobody lives in and need to maintain them"
2. "We already rent many flats for like 300$ a month to low income families, that have the courage for like 10 different visits to municipal office"
3. "Families that are on the edge of homelesness already live in some hostel and might be paying more than 300$ a month just to have a place to stay."
At least that is the gist of it as far as I know.
Second, this is an EU city, so I know that they want to get some initial funds from EU funds (the first set of flats needs to undergo reconstruction, because the basic utilities, like water and electricity are in terrible state) as a pilot 'housing first' project in the republic.