Wow that's expensive. We got our cat done a 6 months, this was 14 years ago, when my neighbor rescued her most recent two we just took them in right away, maybe a few months old. Our county vet is currently around $50-60 for the shots they need and for heartworm tests. When we had a petsmart vet in the area it was only $15 for adult shots an probably not much more for kittens.