Yes, it's tricky dealing with family. Can you and your husband talk to him about keeping a business deal and the family situation totally spearate? You are wonderful to let him stay in your home, but when it comes to your dayhome it's all business. Make him sign your contract and follow all your policies and make sure he knows that you are strict about all of that with ALL your clients and when his child is in your care it is all business. Otherwise you may be in for big problems.

I started my daycare for my grandson and he was here for over 3 years. My daughter and I didn't have any problems at all. I charged her a lower fee than I charged everyone else but she followed all the other rules. I let her bring my grandson much earlier than my opening hours and stay much later but I love them so much it was never a problem. So I agree that it depends on your relationship and the amount of respect and consideration your BIL has for you.