I'm pretty young, and should be in a position to take risks, but the way that the industry is stacked right now, with low salaries and an attitude that you should be happy to even be allowed in the game - I just don't see it.
I'm not normally a very political person, but I do believe that people that do hard work should be properly compensated - even if it is something that the person in question loves to do! Brewing does not properly compensate the work that is put in. If you want to work your way up, the industry attracts such cheap labor that owners want you to be grateful for minimum wage, even though being a grunt doing cleaning in other industries would pay more. If you have the technical knowledge and Q/A ability to open your own place that actually has keg accounts, you need over a million dollars - a barrier to entry so high that you have to have outside investors. If you just want to be a nano, you get to work 18 hour days.
I have a fantasy of opening a small brewery on a farm. I hear about small places that sell bottles at farmers markets or get to be a brewery with less red tape because they grow some of their own ingredients. I live in an area with cheap farmland all around me.
And then I remember that I live in California, not New England - and that our laws don't have anything I can find about being a farmhouse brewery. It even sounds a bit unknown whether or not you can have a brewery in a barn on the same property that you have a house. (Highly unlikely would be my guess)
So, as everybody else says - money, work hours, and red tape.