I definitely don't want a yacht lol.
I'd buy a house in a gated community in a nice neighborhood for my parents, hire a full time caretaker for them, and buy the house next door for my brother (and get him a caretaker too).
But my dream has always been to run a homeless shelter as well as an orphanage. Specifically, a homeless shelter in Los Angeles, and huge children's home in a suburb. Not so much a place for people to adopt kids, but rather, to adopt kids. Provide them with a place that they are loved, cared for, accepted, and taken care of.
For homeless people, it'd be about providing a safe, stable place they can live that has the ability to provide for them psychiatric support to get them off their feet. Somewhere they can rest while they look for jobs, save enough money to move out, etc. Someplace for them to live and have food and shelter from the elements. It hurts to see the homeless now because I want to him them, but I don't have the resources to do so. A warm meal and twenty dollars might help someone for a day, but I want to be able to teach them how to fish, so to speak. And me, alone, have neither the ability nor knowledge to do so, but with money I could have both!
For the kids, it'd be about having a stable, safe home environment with tutors and food security and the nurturing of talent. Access to lessons, academic support, mental/emotional safety.
I mean if we're really dreaming here I'd love to open those homes all over the world-- in North Korea, Vietnam, the Middle East, Indonesia, etc. There's no guarantee that they won't grow up and try to plot to become the ruling class, but hopefully by fostering a love of the community and society around them. Ground up work, I guess.
So OP... I guess, unlimited land, homes, tutors, utilities, permits, visas, apartments, construction work, supplies, labor, etc.