Here is an NBC news article about the average cost of daycare for two children in different parts of the USA. How does the cost of an au pair compare? An au pair is less expensive than any of the costs on this image. And an au pair costs the same amount if she cares for two, three, four, or five or more children.

Here is the link to the original article:

http://www.nbcnews.com/nightly-news/infographic-high-cost-child-care-u-s-n136316