Sitter Job in Mesa, Arizona

I am looking for someone who is flexible and availble from 7am to 5pm. I work from home and need a sitter for when I leave to meet with a client. These meetings are from 2hrs to 5hrs. And I can have a mulitple a day. So could have you from 2hrs to the full 8hrs. I need someone flexible who is able to come almost last minute. I have 3 babes. 4months, 21 months, and 3yrs. Who need to be cared for. My wage I prefer to do a flat fee of 20 a day or 70 a week. As the care I require is minimal