Based on what i've heard from other breweries, you need to build a start-up brewery with at least 10-15 BBL of production capacity minimum if you want to be successful. This will cost you several hundred thousand dollars. Plus you're starting up in Portland, OR---the microbrewing capital of the world.
While there may be successful breweries at the nano/pico level, your chances of success are very slim.
Check out this article by soundbrew.com. They are a brewing equipment supplier. http://www.soundbrew.com/small.html
You need investors and or a business loan to make your brewery become a reality. Start with a good business plan and a line of recipes that have won some awards.