I admire anyone who can do it - and I truly wish you well. I was licensed, etc. and ran an in home daycare for 6 months. Found it takes a special person, and I'm just not that special person.
Our house was small, and I couldn't dedicate a separate area to it. I'd stayed home to be with my newborn DD and found that her needs came last after everyone else was happy. DS (then 5 1/2) would come home from kindergarten and couldn't go in his room because the kids were napping. I started drinking 2 pots of coffee a day, because the coffee was the only thing that was truly mine.
I knew I needed to go back to work when I started counting the hours until they were picked up....from when they were dropped off! I also had kids arriving between 6-9 and then picked up between 3 and 6. A long day, with no sick time or vacation time. I took too many kids on, trying to match my salary at work. Two would have been perfect, and I wound up with 4 plus my own.
Be sure to keep good records, and separate your "business" from your household income. I had a separate checking account so that when I bought stuff for the kids I would be able to declare it on taxes. Check also with your school system. Because I was licensed and in an area where over 50% was free lunch in the schools, I was reimbursed for meals and snacks through the state. You just have to keep precise records.
Best wishes -- be sure to do your homework before starting up. Our library had a YMCA (or YWCA) notebook which outlined steps in starting your daycare which was very helpful.