Hi Anna
I live in Syndey and until a year or so ago was in an Apartment. I only had one child at the time and although the space was ok I did miss having a backyard and proper clothesline (electricity bvill was bigger due to use of dryer).
Have you looked aroung Greystanes?Blacktown or Seven Hills? I live around these areas and have done in the past. i am not sure how much rent you can afford but these areas are pretty cheap.