Hey Brissyboy,
Well done on passing testing so far...... you're half way!!
Phone interview is pretty basic....... about 5mins max.
As for accom in Melbs, yep, you have to get your own accom sorted. If you get to know a few others on this forum (once offered a post), you could perhaps organise a share house with car pooling to save costs, seeing as though the paying isn't huge whilst training. (approx $1200 f/n after tax).
I do believe however if you are an interstate applicant, AsA will pay for your one way ticket to fly to Melbs and put you up for a night or 2 only.
Goodluck for the remainder of your testing.....