Have you thought about doing night or weekend work. I did this after DS1 was born it ment everything i earnt was mine and DS didn't have to go into child care.
I worked at a supermarket, wasn't the most rewarding job but the $$ wasn't to bad and the hours were perfect for me. Just 6 hours 1 night a week and 7 on a Sunday (double pay) I started early Sunday so was home for lunch.

Just a suggestion!!