I'm not trying to burst your bubble here but instead hopefully am providing some reality check.  Frankly, LOTS of people are proficient in Photoshop and similar programs.  That and a $5 gets you a coffee at Starbucks.  Frankly, LOTS of people produce/design/whatever brochures, flyers, pamphlets, etc. as a side duty of their job (myself included).  Again, so what?  While it impresses my boss that I can and have done this, it wouldn't impress a professional graphic designer or marketing person or advertising person or even the head guy at Kinkos.  And let me tell you, I've got a brochure that's been distributed to over 1 million people that I'm quite proud of but I have no illusions that I'm the next art director for IBM.

If you think you want to be in some form of Marketing or Advertising, you would absolutely be swimming upstream without a degree in the same.  Even then, it is a hard field to get into.   Most people have to start as the Admin Assistant in the Marketing department or something along those lines. 

Graphic Designers, especially those without degrees in the same are also a dime a dozen.  It takes a lot more than just being able to put together a decent brochure to work as a graphic designer.  There are thousands of freelancers out there competing for the same small pot of projects.  In any corporate graphic designer job, first off again, you've got tremendous competition and secondly, many people get into those positions thinking it will unleash their creative side, only to find out that they spend their days measuring to ensure that the corporate logo landed .234 inches from the top of the brochure and that the printer used PMS 365 not PMS 265 for the print job.

Whatever aspect of this you're considering, no company is going to put you through school to learn it on the job.  There are tons of people out there who are already qualified to pick from.

You've gone a really long way down this Education road to totally throw it out the window now for an unrelated career.  Especially one that you really can't define and don't know anything about.  And again, frankly, you've got no reason to think that you'd be making a better choice with this new idea than you did with the last great idea.  Perhaps it makes more sense to stop, think, see a career counselor and find out what it is that makes you think that you don't like what you're currently doing.  I'm wondering if maybe you'd be able to merge what you are doing with this creative urge by teaching arts and crafts or something along those lines. 

Tess