Help,my cat needs surgery

Two days ago I started a gofundme page in regards to surgery my cat needs , I had yet to see the vet, so today things have changed, the estimates are at the low end $1500, the high end was $2200, his age is somewhere between 12 and 14, he showed up on my doorstep approximately 11 years ago, we figure he was about 2 years at that time, I don't want any confusion, he desperately needs the surgery to have teeth removed, he is my best friend. I have tried every other avenue and have gotten no where, please anything would help