2 Questions re: starting an unlicensed day care at home in Virginia.?

I want to start a before and after school home daycare for children in my home to help bring money into my family. The average hours spent at my home will probably be 5 1/2 to 6 hours every day. My first question: What is fair price to charge? I know daycare facilities charge around $75-90 a week but I don't know what the ave. is for home daycare. My second questio: Does anyone know what the child ratio is for home care? I know the law is different for unlicensed home care. In some states it is 3 children in addition to your own. I live in Winchester, VA