A billion people across the world may want a house "as right" in San Francisco. It may only fit three order of magnitudes people realistically, though.
San Francisco has better placement than 99,9% of Earth.
Most of places on Earth has snow, heat waves, no coasts, biting insects, or a combination of that. They are also not located in the richest country, in a place which historically produces jobs.
So, under this regime specifically San Francisco will get population influx until it is not usable for absolute majority of people (think a bro dormitory the size of SF), and that process will be repeated for many other lucrative locations on Earth (heck, many cities are arguably already going that route).
I don't see how free housing differs from sacrificing every place you like to tragedy of the commons on grand scale, until there is nothing for you to like there anymore and you move on yourself.
Other than that, there are places on Earth with basically free housing. Check out Vorkuta.
I am not 100% sure what the NGOs do when they arrive in NYC but it seems that they do get hotel rooms fully paid for by the NGOs. What is more surprising is the huge amount of new stuff they purchase and discard. The whole thing is completely orchestrated by people and organizations with HUGE amounts of money. I don't understand what they are trying to accomplish. I don't fully understand how the migrants can afford to waste so much either, it's insane: https://t.me/retardsoftiktok/15550
Could you please stop posting unsubstantive comments and flamebait? You've unfortunately been doing it repeatedly. It's not what this site is for, and destroys what it is for.