The irony of your comment is that New Rochelle, the town where this daycare is located, is not one of those places where the social structure has broken down (and people mill around on the sidewalk at noon on a weekday). It's a working class town composed of black and hispanic people who work service jobs in Manhattan or the other wealthier Westchester towns. The neighborhood has bustling shops and stores, and restaurants are full of families in the evenings.
So according to the 2010 census its nothing like you have described. its 60% white and the median income per family is 88k
However I while I can't find the numbers for that specific town I imagine they don't deviate from the national statistics of 70+% of minority children in single parent households. The social structure _has_ broken down and we keep ignoring it like its not a problem.
The census region includes the suburban area north of I-95, which might as well be a different state. The downtown has a heavy representation of immigrant families. Immigrant families have about 25% of children in single-parent households, far below the national average.
Also, whether a household is one-parent or two-parent is irrelevant to the childcare situation. Two parents with late night shifts aren't going to have an appreciably easier time than one parent. And your point about grandparents is also inapposite. If you have small children, it's unlikely your grandparents are old enough to already be out of the workforce.
The model I have seen is the family unit ( mom and dad ) have kids and those kids go out and have children without a partner. Then the grandparents are in a two income household and they provide shelter and income subsidy to the children. As far as that not mattering, it totally matters two parent households have many more options in terms of childcare and employment. The number of households where both parents have off hour jobs that are low paying is marginal at best. With two parents just by one parent staying home you can make almost as much as you would pay to have extended daycare for the kids.
So your numbers make sence. First generation Immigrants typically move as family units. They would also lack the social net to assist with kids, so they might be prime candidates for this kind of service.
