Hi Sweet, not much advice, but surely you would be able to get some Rent Assistance from the government? I am not sure how this works, and you probably already know this, so it is probably a silly comment, but just thought I would write it anyway!
It has been a few years since we rented now, so I am sure prices have changed a lot. Back then, I think we were paying about $250 a week for a massive house with a huge yard. It was much too big for us actually, and before that we were paying about $165 per week for a new townhouse (I am talking back in about 2004!)...we live country Vic though. Good luck.