If I couldn't fail, and resources were no obstacle, there are several things I'd like to consider
1) A Books and Cats cafe: Picture a bookstore with a coffee and pastry bar, and a separate room where, if they choose, patrons can read AND interact with cats/kittens available for adoption. Sounds like heaven on earth for me!
2) Set up a community center of sorts, where kids could gather and hang out, play video games or board games, play sports (just friendly pickup games, not organized leagues or anything), start their own interest groups. We could do weekly movie nights, monthly book clubs, a Lego club, etc.
3) Set up a shelter for women and children who are trying to escape domestic violence situations. This is something that is VERY close to my heart, and I'd love to be able to set something like this up here in our town.