Musk raised $44B of real money to buy Twitter and bring it into private ownership. I’m saying had he just left well enough alone, he could have used that money for other purposes
Your point on adding more supply to the real estate market to prop up prices is the opposite of Econ 101 - more supply, all things equal, will reduce prices. Mental health is a much larger barrier to receiving help for the homeless.
I used to volunteer weekly with homeless and housing insecure people in Philadelphia and untreated mental health or substance abuse was an issue for many. There are also barriers to receiving government aid that would assist them because many programs require an address or the process is unnecessarily complicated.
Housing is just one step. They would also require a great deal of counseling, job training, and medical attention to reintegration into society. Anyway, my point was simply to illustrate what a magnificent waste of resources it was to buy Twitter.