Yep, hence why my comment makes no mention of which university the OP should go to! I literally meant “go where you want to live” I.e. go where you want to attend university - my post makes no mention of CSU or Adelaide specifically.When you talk about "go where you want to live", I think anyway OP will return back to Sydney after graduation.
RE: transport/living costs: a 1hr flight from Adelaide to Sydney is almost always going to cost significantly more than a 3 hour drive.