Neutralization of neighborhood cats for longevity

Neutralization of neighborhood cats for longevity

We want to neuter as many cats as we can from the neighborhood for longevity and why now the cats in the neighborhood give birth to too many kittens and use nests in the neighborhood and kill them or are killed by cars and I have already collected many corpses from kittens and help me with this and other cats so that we do not see other kittens on the street killed.I have already done 4 cats sterilization and there are still 10 left. The cost of sterilization is 100 together with the medicines but I can not take care of all the cats as much as I want. Help them to be saved and protected from diseases and many others because whatever money is left will go to the roof for the kittens!