1k AUD, sure bo?
when kastam questioned u have to show u got enough in bank/cash to fund your trip, credit card not counted
happened many cases, especially m'sian get targeted, too many illegal working there

anyway, I would store cash in Wise then withdraw from ATM there
1k AUD (cash/in wise/in bank) is probably reasonable provided you already got accommodation

not really cash on hand they looking for, just if you got enough money to support your trip, like cash in bank for example
to clear doubt that you are not there to work illegally