It's a brave move if you do, but I can't help thinking it's not a guaranteed way into a 'better' job. You may find that you end up with a good qualification, but that no one will touch you because you've got no experience.

I may be completely wrong, and it could be the path into your dream job, but generally after graduating you start off at the very bottom of the career ladder and earn peanuts.

Are there no other avenues you could explore in your current role? Such as looking further afield, advertising your services more, flyers, leaving business cards in supermarkets etc... Or even lowering your prices so that your services become more attractive.