Not sure where you are getting your info from. As far as I am aware to go down the route you are talking about you need to do a minimum of a 2 year cricos approved course. In addition, to pass the TRA at the end then most trades will require you to have at least I think its 900 hours of work experience ( presumably obtained in part time work during your studies. I suggest your first port of call is the Dept of Immigration website and the section on student visas. 880 or 881 (australian sponsored) are the routes to
PR. Incidently this is NOT a cheap route. I have just been accepted on a 3 year degree course which I am hoping will lead to
PR and including course fees, living expenses etc ect it is going to cost me around £50000!!!