One of the more interesting debates that goes on about Social Entrepreneurship is the issue of being pulled off mission by concerns over money (and that NEVER happens in a traditional non-profit, does it? -sarcasm intentional) The truth is that even if you are forming a for-profit entity, it's not about the money.
For the commercial entrepreneur, money is how you measure the success of the venture. For the social entrepreneur, the metrics are a bit fuzzier (but that's a topic for another post).
Interestingly, how their brains work is really quite similar - Take a look here at how entrepreneurs think
PS - If nothing else, this constant adjusting and ability to assemble disparate resources should convince you that the Social Benefit industry needs a lot more folks who can think this way.