Recently, I came across an interesting business model where the a couple started their brewery inside an existing restaurant and eventually opened their own brewery. They are called the Worth Brewing Co..
The brewery is not massive by any means, in fact breweries usually measure their output in barrels, this brewery currently measures in gallons. They brew in 10 gallon batches, which can be very labor intensive and also very good. With the brewery being so small they can whip up new recipes in a whim and rotate their tap selection very quickly.
Although they do not seem to be taking over any of the big breweries anytime soon, they are well on thier way to establishing themselves in the local area and have expansion dreams in thier near future. Good luck guys!
You can check them out at: www.worthbrewing.com