Ya, looked into a while back when I was still trying to make friends with these strays... the best deal I can find in my area is $150 plus tax for males, and $210 plus tax for females.
I don't have much coin to spare but there's just no way I was leaving those strays to fend for themselves and make things worse, so I'm squirreling money away to get them done in batches. My neighbor is chipping in $200 so that'll help too.
Bonus is now the neighbors are calling me the cat whisperer because the strays all come running when I'm around lol