Fixing 6 Feral Cats

Long story short a litter of 6 kittens were born in my backyard, the mother disappeared after a couple of months so I took up feeding them, now it's time for them to be neutered and vaccinated and it's $70 per kitten... I love them all dearly but I really don't want to have another litter of kittens born in my backyard again on top of the 6 cats I'm already having to look out for and feed... Please donate anything you can, literally anything helps!

Edit: Any extra money I get from my gofundme will be donated to my local humane society PAWS, they've been the ones helping me and they could really use the donations!

Edit2: People are showing concern for the high cost of the vaccination/spaying/neutering of my ferals, I live in a small country town in Texas where there aren't any real programs for free/cheap TNR. I've explored all of my options and the closest low cost TNR program is a couple of hours away and since I've already had to make a trip to my local humane society 3 times to transport 4 kittens that's obviously not a viable option for me ... especially since gas on top of the cheap tnr would still probably add up to a lot anyways not to mention the stress it would place on my wild kitties