Watch out for tax!
Find out how the ATO will consider the money. They may count it as income for the year, which means you could lose 40% plus of it. (I have no special knowledge in this area, just a suggestion to consult someone who does.)
You should also be aware that Australia has, by many calculations, the world's most expensive houses, when compared to incomes, and the highest levels of personal debt, when compared to GDP. And, it's probably the only country in the world with a debt-fuelled housing bubble that hasn't popped yet.
But Australians are obsessed with houses, so I guess I won't talk you out of that.
But you should find out what the govt will want to do with your money.