V.B.
I just went from a working full time back to being a stay at home mom just recently and paid just slightly less per week because it was a family friend that was nice enough to let us pay her whatever we could.
So I only have experience from calling daycares and getting prices, but $100 a week seems good to me because, the places I've looked into before were around $150 a week, and if I were looking for childcare I would prefer an in home day care, because I would feel like they would get more one on one attention.
So yes I feel that price is more than fair. Also let me know how you like having your in home childcare. Soon I want to look into something I can do from home so I can be with my son.