Here's a little post to help you work the practical side.
I'm in the midst of starting a (not-conjure) business, thanks to Women's Initiative for Self-Employment, as described before. A classmate of mine, Dream Doula, turned me on to a website that is a mine of information:
There you can find out all kinds of surprising things about any town you might want to work in: where are the richest neighborhoods? How many gay households are in your town? How much money does city government spend on services? How clean is the air? What is the racial makeup? Is the economy growing or shrinking, and why?
You can advertise your business, too.