Buy a house in a safe neighborhood for myself. Establish at least one housing complex for the homeless with medical, psychiatric, and general care staff as close as possible to said safe neighborhood. Repeat until all that is left is enough to keep said complexes staffed and operational for at least 5 years.

Keep at least $1,000,000 to invest into the stock market in various ETFs, REITs, and LEAP Option calls. All profits goes back to maintaining and establishing more housing complexes for the homeless.

All my free time would be spent figuring out how to end the homelessness crisis. If ever accomplished, focus my efforts on the public education system, and praying I somehow have the willpower to avoid corruption.