Bigfridge is pretty much on the money.
You will need FULL compliance and permission from council before you can go anywhere near the Office of Liqour,Gaming & Racing. This will be a difficult step with council, as you will most likely get a reply of " You want to build a what....mate, we have never delt with one before....we will get back to you". There actually is a book that councils go by ( I have seen it ) for things like breweries, abbattiors, factories etc and they may refer to that...if they do...man you are up for a lot of hassle, if you can show it is only going to be small scale and waste etc is not an issue it may be easier.but you will need EVERYTHING sorted from cleaning chemicals to trub disposal.
You then go to the NSW OLGR and apply. If it is only for a brewery that has no retail license ( ie you are not selling to the public ) then life will be easier, once you want to sell from your brewery to the public, life gets impossible as any other license holder can object to it. A brewers license ONLY allows you to sell direct to retail or wholesale licensee's. You will find that most Micro's are set up within or as part of an existing licensed premises, this allows them to sell beer from the brewery via a retail outlet. Murry Brewery at Taylors Arm is an an example. They sell their beer thru the pub, which has its own license, you dont actually buy from Murry's
The ATO
Start here
http://www.ato.gov.au/businesses/pathway.a...001/003/043/003
They will want to know everything and then some. There primary purpose is to collect exise tax so you will have to account for every bit of grain and beer to make sure you are not cheating them. You will only need to have calibrated fermenters, as they collect exise on the brewed volume, not bottled. So if you brew 1000ltrs, but only bottle 750ltrs you pay excise on 1000ltrs. They will also take into account efficiency as well and will check your methods and recipies.
Finally, there is everything else like bottles,labels, transport etc. this is the most expensive part of it. The actual cost of the beer accounts for about 30% of the actuall total cost
Try this basic spreedsheet that I made up. You can fiddle with the number
View attachment beer_cost_sheet.xls