Hi M.,
Congrats on soon-to-be #2!! I agree with everyone else, especially Melissa the RN. I had a c-section with my son and the doc wouldn't let me even think about going back to work until after my 6 week checkup (which, actually was extended by two weeks, so 8 in total). You don't want to overdo it, Heaven forbid you pop a stitch or get an infection or whatever else.
Only you will know how your body will react and heal and while it might seem like a long time at first, those initial 6 weeks will go by like that. And hopefully the parents of the kids you take care of will be more than understanding.
You might find it more difficult than originally theorized to deal with healing with a c-section, taking care of a newborn, AND your little girl, without adding the concern of whether or not you can handle the daycare kids.
Listen to your body, enjoy the addition to your family!
Good luck with everything!
K.