R.J.
In our area nannies range from 15-35 an hour, w most I know making about 25 per hour. 25*24= 576 a week, or about 2300 per month.
Cheaper than group daycare, though, since infants *start* at 1600 a month, and potty trained kids at 800... and both only go UP into the 2k-3k per month range, a nanny is usually far less expensive than group childcare when you have more than one child in care.
An au pair might be another thing to consider, if you have the space. 4k up front to be held by the company as a contract bonus at the end, room, board, and $125 a week for 30 hour max. With the bonus that comes out to 875 per month. There are 3 main "types" of au pairs. 2 programs via the US State Dept (students and nonstudents), and private au pairs.