Hi Alex,
I am form Venezuela, going through the migration process to move to Australia next year. I can“t answer your queries as I have never been to Australia, but the link
http://britishexpats.com has lots of info about australia and there a lots of british people who chat and post messages in the forum. You may find useful information and I am sure somebody out there in the forum or chat room could give you the information you need about melbourne.
Also, somebody in the britishexpats forum posted the following links that may help you:
Go Matilda
http://www.gomatilda.com
Migration, businesses for sale, rent, etc. Again, more Brit-oriented.
http://www.gomatildaforums.com
These are their forums - migration stuff and regional communities - Sydney, Melbourne, Perth, Adelaide and others. Registration needed for the regional community forums. These are slightly less than British Expats but still very informative.
Real estate. To get an idea about prices, quality, etc.
2 largest ones:
http://www.domain.com.au
http://www.realestate.com.au
Detailed descriptions, photos.
This one is not bad either:
http://www.realestateview.com.au
It's smaller but quicker and still comprehensive. There is a nice option of Quick List.
Hope it helps!