Australia is one of the places I'd like to see someday... its on the other side of the world for me.
You set yourself on quite a journey. Expanding an Amiga500 is a chellenging tasks as there are by now so many options its hard to keep track. Do you want the expansions to be all internal? Are external expansions ok as well? What is yopur limit? If you shoot too far (whoch you can easily) you might better be off getting an A1200 ... or an A4000
Keep us updated on your progress!
What did you do in the past with your setup? Gaming probably, but also something else? Coding?