Off Grid Power

While my electricity is 50% plus lower than most in town....I still want to reduce my footprint.  Solar and wind power will also be the only means of producing power at the Gum Tree Garden Studio.
So where to start.

What do I need?
A calulator for off grid usage can be found at http://www.energymatters.com.au/climate-data/saps-electricity-usage.php

Where do I get it?
http://www.polygreensolar.com/about-us.htm  a link sent to me by Abbie Vievers at Serendipity Farm .