Need A Babysitter While My Kids Are Sleeping.

I'm a single mom of two-, 4- and 6-year-old, on a fixed income and going back to work on October 28th. Problem is, I have to leave at 4am! My kids sleep till 8 a.m. and I need someone there during the morning hours until they wake up. At 8am, my kids get up independently and have learned to shower and dress themselves. At 8:30am, my son needs to be walked to the bus stop. 8:45/9 a.m. my daughter needs to be dropped off at school, which is 10 minutes away. I realize that it's extremely early, however, I'm hoping I can work something out with someone. The just is super easy and essentially only requires 1 hour of babysitting.