Just read through this and I just want to make sure that people know what you are talking about. You said that you want to get some "red eyed tree frogs" (without giving any scientific name), but at the same time you live in Australia. Now, as for as I know, you're only allowed to keep native species, right? If that's the case, you are probably talking about Litoria chloris, which is the "Australian red eyed tree frog". However, when just typing "red eyed tree frog" on a international forum like this, everyone is going to asume that you are talking about Agalychnis callidryas, which is known world-wide as the red eyed tree frog.
So, to avoid confusion, what species are you actually referring to?