Yeah, thats the parenting payment. Its actually not all that much more if your single.
But then there's family tax Benifit Part A & Part B. So look up the max rates for those & you'll have more of an idea. They are based on your financial yearly income. It should tell you on the centrelink website how it all works & how much you can make before it affects your payments.
Then there is also Rent assistance if you are entitled.