There is what is called 'priority of access' which if you google that with childcare you should find the info, as you say working parents get priority over others, etc, etc.

Something worth considering is JET allowance. As I understand it your hubby is studying also? If so you may qualify for this which greatly reduces CC costs - as in a few dollars a day - I had one parent who was paying about $6/week for 3 full time children!!

Also check out my child . gov (excellent for centre info) the childcare access hotline (google for info), care for kids . com . au for listings of centres and fees, etc in your area.