i looked into it, coz i was gonna go to UNSW before i bombed out.. living in a basic flat, in sydney, will cost anywhere from $170/wk [2bed, very basic] upwards.. depending on how much u wanna spend, or how fancy u wanna go.
keep in mind that living on campus will cost about $270 a week, single, and usually they want most of it upfront.. which will make it a whole lot more expensive than fitting out an unfurnished unit.
also to remember, you dont really need to have the fanciest most well put together place around, all coordinated n stuff. i mean, its nice if ya can, but if ur worried about spending too much, then second hand places and discount shops are the way to go. if ya look around, u can find some really nice stuff, thats not too expensive.
i hope this helps!
p.s - if anyone knows anyone who needs a female flatmate in the Logan [south Brisbane] area next year, let me know!!