I think for the current clients, 6 months is plenty of notice. There are some friends and family members that won't be finding out I'm pregnant until I'm 3 months (3 more weeks!) so I definitely won't be telling my dc families until after that.

However, this new family, is tricky. I think I would likely tell them now and give them the choice, if they decide not to come, I'd advertise that I have a spot opening up from xx date to xx date and hope to fill it that way. Not sure about TO but dc spots are sometimes hard to find here so I think the chance of filling it would be okay.

If finances are a concern though, you need to do what's best for YOUR family and don't feel guilty about it!!!