I see ads in the paper and bulletin boards of businesses that have flyers and such for low cost spay and neuter, I would definitely check for those. If you're "low income" your local Humane Society also does low cost spay and neuter. I just got a certificate for spaying a starving stray cat that showed up the other day, for $10, normally $25, but she said since I do so many other things for the Humane Society, she said she would let me have it for $10.