I am about 90% finished drafting our business plan for a packaging brewery in Minneapolis, MN. You should go to SBA.gov and check out their business plan templates. They are extremely helpful. No need for software, IMO -- the web has a ton of free resources that provide more than ample guidance. Drafting a solid business plan is a huge undertaking, but I can't imagine not drafting one. Once you do it, you will have an entirely new perspective on your proposed business.
Also, you should join the Brewers Association as a brewery-in-planning. We could not have drafted our financials or marketing plan without the BA's statistics and industry averages. But you'll also have to do a crap ton of research on your own to see whether the numbers in your local market square with the BA's data. For us, the numbers were pretty similar with a few exceptions.
FYI, we are raising capital through a variety of ways: SBA 504 loan for equipment, crowdfunding via Kickstarter (this is really more of a PR effort), and a mix of privately invested debt and equity.
Re: competition in the marketplace -- yes, it's true that there are a ton of new entrants to the craft brewing segment. But, if you draft a solid business plan, capitalize your brewery sufficiently, bring something unique to the market, AND BREW GREAT BEER, you'll have a fighting chance of succeeding. To a certain extent, I think you need to put on blinders when it comes to the competition. If this is something you are ready to pour your heart and soul (and a hell of a lot of time/energy/money) into, then go for it!
Cheers and good luck!