How much does a child care provider cost in San Mateo, CA?

"Jessica has helped care for my children for over 11 years, ever since my oldest child was almost a year old. She was a full-time nanny when my 3 kids were babies and is currently helping us daily part-time since the kids are in school now. My kids love her! She is punctual, reliable, and responsible. She is great with kids and makes sure to engage with them in activities, always participating in their games and play and taking them to parks and libraries. She takes feedback well, and she is easy to communicate with; I appreciate her flexibility. She has been indispensable for all the years I've worked with her and I feel truly blessed to have found her early on."