Since they are kittens doseage can be somewhat tricky so a vet is pretty much necessary. Call around to the vets and see who offers the best prices. There is a huge difference (I live in Wisconsin, US and office visits in my area vary from $25-75). Usually vets who serve the farming communities have lower rates. Most vets in my experience will let you postdate a series of checks to time pay for services, so ask about that too. You might call the humane society and see if they can help you or suggest thces e most affordable services in your area.