404,
You are right mate, Air Centre state that the price quoted was for minimum hours and that all extra hours required are charged at the applicable rate ($175/hr or so).
However I searched information from near and far, had several interviews at different schools in Melbourne and found, for example, that the school that the Qantas cadets go to wanted to charge me over $80K for the minimum hours and all extra hours charged at well over $200/hr.
I have a sling file full of brochures, print outs and notes to back me up.