Sorry man, I can't help you out with the laws in VIC., I'm in S.A. :thumbsup:
It's hard to estimate how much a particular plant will yield....generally Indica strains are the choice of commercial cash croppers coz they yield more per plant in a shorter time. Sativa strains take longer to flower but the "high" is different & they don't yield as much as Indicas. It depends on what YOU want to smoke & grow. There's a lot of information here, I hope you find what you're looking for....:stoned:
Peace & cones
Slayer :hippy: