I believe there are "diamonds in the rough' and I would do whatever I needed to bring the homeless back; mental health facilities, job training, places to live, scholarships.

Animals and children. Who needs it more?

..this place

One of the big ones? I'd buy every apartment complex I could, retro fit them with green tech(solar panels, greywater systems etc) and drop everyones rent to 500/600 $. Get a ton of homeless folks into the empty places. Then I'd give generously to various ecological charities and social democrat candidates. I would also love to walk into animal shelters wherever I go and pay the adoption fees for every animal in the place.

Very easy. Animals (the non-human kinds). Pets, farm animals, strays and ferals, wildlife.

Depending on the amount. I had thought about buying an abandoned mall and transforming it into housing for homeless veterans.