Idk if this is a hobby, but I caught another stray kitten. This is my third one so far, and it is by far the youngest. I don't have the cash to take it to the vet, but I can at least give it food and teach it what human friendship is before finding it a home.
Look up cat rescues in your area. Some of them might help with free or discounted vet care. Years ago, when I was broke and rescuing, a local group helped take care of most of the bills.