I have an idea for you--
Find a shelter in your area. They are probably swamped with cats.
You can take the extras, and be a "satellite" shelter for a while. That means you could take advantage of their resources too--access to bulk food, their arrangements with vets... Of course you'd have to run things the way they want, until you have formed your own connections and can strike out on your own. So make sure you agree with their cat-care strategy