Unfortunately you probably won't be able to make huge profit with BS in WoW unless you have the ability to craft epic or sought after items. That's just the way it is. I'd concentrate on leveling your skill so you can get the plans from Outlands and start making those. Any pieces of the imperial set you make, maybe stick in AH to try and sell.
Sttck with it, because there are some very nice BoP pieces in later levels, and also pieces that require a certain level of BS to use.