Oh, I can't wait, "Random person who's only been here 2 months and probably has little to no programming experience in any "serious" language other than DBP, more of which will most likely be needed to create an even remotely viable type of game creation system".
*breaths in after long sentence*
That's better. But seriously, xgame masterx, do you have much knowledge in a programming language? It's possible just in DBP (look at Quikly), but still exceptionally hard. Chances are you'll need a load of custom-made models to pack it in with if you want to sell it, and selling it is still a gamble.
Look--the point is that you should do what you want. After all, I could be wrong; you could be a 42 year old with 15 years programming experience in a huge range of languages. But then again, if you were, you'd have done this post a little better. You'd also know how impossible it is to create an engine (moreover one that was only officially released in November) that doesn't have bugs in it--in fact, FPSC is fairly bug-free when compared to some "other" engines.
Evil has a new name. Demo out now!