Take the GMAT and see how you do - also look at several of the core classes in the program you're interested in and see if you feel it would be a good fit.
You may also want to do a few searches on the value of an advanced degree:
http://www.usnews.com/usnews/biztech...areer.grad.htm
Don't forget the time/money/value equation - you'll be zero income for a few years then a slow progression through the apprentice ranks to the big bucks. The longer that take the more risky the value of the advance degree becomes (sound familiar?).
For comparison, do the math on setting up your own plumbing business. Those with business savvy and a trade skill are doing quite well.