But see, she wont. She wont turn 18 until the year after she finish's year 12. She will turn 17 during year 12 (well at the start basically).

So that could work in her favor, or against.

i.e having a car in year 12 would be great, BUT, being able to get into clubs, could distract her away from studies...

hmmmmprh
I found when I was in year 12 those who wanted to go out did, regardless of if they were old enough or not, as that is what their friends were doing. Also not everyone who turned 18 suddenly went out clubbing and neglected their studies, it is really one of those things that depends on personality.