Hello S.,
What a precious little blessing God has given you with your son!! I commend you for searching for wisdom in your decision for childcare. You have a hard road being a single parent and your son will thank you one day for the wise decisions that you make for his well-being.
I am a former daycare provider, Nanny and aide for the school district near my home. So I have had a lot of questions asked of me and have had several interviews. Ask any questions of the daycare provider that you wish...even if it seems awkward and a little silly. You are the parent and you are looking for the best care for your son. Remember she will be nurturing him while you are not present.
Find someone who is licensed. It is a State Law and they will have the opportunity to have extra insurance coverage on their home just for the daycare. And, because they are Licensed through the State of Michigan...they are checked on without notice. Having someone come into your home...they do not need to be licensed.
I would look for someone who doesn't have a full house so your son can adjust slowing. Look for someone who is going to take over for you while you are gone. Will she take him to the zoo, library, walks in the park, grocery shopping. He needs to experience all of these things that you would do with him. Does she have a routine schedule with activities, play time, lunches, naps,crafts. How much does the TV babysit your son or are the older kids playing video games and he will get attached to it.
Ask her why she is running a daycare. Is she doing it for the money, because she actually likes kids, or both. What does she do in the case of disciplining at child. Watch her reaction to your child when you go to the interview. Does she ask to hold him??
I hope that this helps. I'll be praying for you in your decision.
H.