A.J.
You can find nannies that work with an hourly rate or a flat rate for the week. I think for 2 to 3 kids, you can expect to pay between 12 and 15 $/ hour. There are several good nanny agencies that can help you screen and find good candidates - I have used First Class Care and Teachercare. There are also nanny searching websites where you can find some nannies with less experience who might work as low at $10/hour (of course some what more)- enannysource or care.com are pretty good sites.