In my area people pay around $12-$15 an hour for quality care. That is for one child. You might happen upon someone who charges $10 an hour for one child but that is rare and often the quality of care is much lower. Luckily, I have my sister for backup care because I have three children and working as a manager in retail does not enable me to afford a full-time, quality nanny.
You might look at a home daycare where the person is watching other children as well. When I had two kids and was looking into getting childcare prior to my sister agreeing to it, I got quotes of around $150 a week for one child. That was for care that included keeping the child until around 6, any later would have been more. Childcare of any kind is expensive and the higher the quality of care, the more you'll pay.
One daycare that I checked out included all meals, had a pickup time of 6:30, and had cameras in the rooms that parents could access (with a secure password) any time they'd like so that they could see what was going on without leaving work. Windows were in all the rooms (meaning windows from the hallway to the room), you had to be approved to even get through the front door (meaning known parent, pre-approved pick-up person, etc.), and drop ins were welcomed. They asked for about $170 for infants and down for other age groups, per week. Each additional child was 10% off.