This looks like a good choice for Aussies not being able to move to airlines in Australia. When was the last time QF actually hired people from the street? Pre-2007 I believe?
Expect to make about $2K to $2.5K a month whilst flying as a regional FO in U.S but as a single, you will survive. Some of my instructors had to do extra part time jobs to feed their families. Get the hours and move on. If you somehow can get green card, even better. Move to US majors.
Hell, I've got my U.S commercial certificates but have been flying only turboprop in South East Asia. I'd definitely go to U.S just go get some jet hours and move onto a greener pasture.
But is this thing real? E-3 visa still requires U.S employers to prove that they can't find Americans to fill the positions.