I am so sorry you are going through this, it must be so heartbreaking. There has been a discussion previously on this thread of North American society viewing cats as being more disposable than dogs
.
The only thing I can think of is to bring it to the attention of the media, try to get vets who will offer their services at no or low cost to spay/neuter them. Canvas pet food stores and ask for damaged cans/bags of cat food for very low prices. And finally, if you can, get your local council involved in trying to supplement low cost spay/neuter clinics. At least if they are spayed/neutered they won't be populating. The media can be your best friend
.
Hopefully somebody else will come along who can offer more substantial advice
.
You are an
to these kitties.