I love this hobby too much to ever want to do it for a "Job." Not everyone wants to do this for money. A lot of us like this hobby way too much to ever want to turn this into work....It's one thing to get up at 10am, get brewing by noon, and drink all day while standing around with your friends to brew 5-10 gallons of beer, that doesn't necessarily have to be the same recipe every time, and have to maintain consistancy from batch to batch. And to start at 5 in the morning mucking out several hundred pounds of stinking grain from the mlt from yesterday's backbreaking brew day, and spend another 10 hours a day doing it again. Not to mention it's no different from any other business, people think breweries must be places of drunken bachanalia, but it's no different than any other factory or places of business, random drug tests (someone posted on here that he couldn't believe that when he applied for a job there they made him piss in a cup) deadlines, taxes, licensing, inspections, budgets ad nauseum.
Brewing professionally has as much in common with what we do as building model airplanes has with being an airforce mechanic. It's a matter of scale and responsibility.
If you want to get an idea of the reality of trying to start one, read Brewpastor's great thread
Don't Try This at Home - parts 1, 2 and 3.
And we have a thread of just the opposite; folks like me who would never dream of trying to do this for a living.
Show of hands: Who doesn't want to go into commercial brewing? It's folks who have a more realistic view of what commercial brewing is, and want to keep that away from the fun we're having now.
If you want to understand what you need to do, start
here, and
here, then go to your State's alcohol site for the hoops you have to go to there, and refer your other questions like that
to here. Probrewer.com is the best resource to go to for questions since people are actually doing it.
Also, Cape Brewing actually has a great thread on what's involved in going pro.
I went "pro" - What it actually takes to do so.