I really liked the thread: How do you make money with your medium format camera?

It's one thing to be a great shooter and market your photography, but I think that there might be a larger market for the person who can make prints for other photographers. My local lab has stopped doing B&W for a few years now, and they've told me that people are still asking about it.

What would be the tools and resources you'd need to run a profitable black and white lab?