Leia is not fixed but she is constantly indoors and her "boyfriend" is Elliot so no babies there. Although, I will get her fixed later so hopefully she will live a much longer life, or so I've read. The other two cats are Bob's kittens that are under 8 months so I haven't got them spayed/neutered yet. Furthermore, I can't find a humane society that will do a "group rate" lol. They do have their shots though which brings them down to about $60 pet cat which is pretty reasonable.
Leia could very easily slip out the door sometime when it is open. Please have her fixed too. And yes, it could mean a longer life for her. At least a much happier one not having to go into heat every 2 or 3 weeks.
Bob's kittens need to be fixed now! If they are already 8 months old they are capable of getting pregnant. Females can get pregnant very early in life. That isn't fair to them. Males are capable of impregnating any time after 5 or 6 months. If males aren't fixed earlier it also increases the chance of their spraying. I don't know if you have ever smelled that.
As for finding a humane society who will do a group rate... speak to vets (more than one), speak to rescues, speak to every humane society you can find. We have a couple of very young teens in here who have fixed countless cats/kittens. They are in the States and seem to have found clinics that will fix cats at a very reasonable rate. Almost makes me feel like moving there just for that (not!). kathryn and katherine93 - please speak to them. You can start a thread to one or both and I am sure they will be happy to guide you as to where to start looking.
I sincerely hope you will consider this info. It is in the best interest of your beloved pets.