B.M.
One of the first steps is to get licensed by DCFS. If you give them a call they can set up a homesteady. Someone will come out to your house and evaluate the space that you are going to use, your home and employees.
That is as far as I have gotten. :-) Good luck, this is somehting I have always wanted to do. As a matter of fact, I was really thinking about starting an evening daycare for parents that work nights. I dont think there are many of those.