Yet there are single parents all over the United States working multiple jobs to get by. Childcare exists without paying some boutique daycare tens of thousands of dollars a year.

They dont have 4 kids under 6. Which is significant difference. Childcare for 1 or even 2 kids is much cheaper and easier to find then for 4 of various ages.

The single parents of toddlers working multiple jobs either pay for childcare or have whole network of familly members to help them. There is no way around the fact that toddler needs supervision incompatible with most of work.

I work in the restaurant industry and I can assure you it is not impossible because millions of Americans are doing it. Most of the time the child ends up with the grandparents while the parents work. That is if the grandparents are not working...

The grandparents are caring for 4 kids under 6 daily in millions of American families?

Also, most grandparents in fact are in working age when the grandkids are small. Some are sick, some never returned to work after kids grew, but quote a few always worked or returned to work. And even with those who are at home, asking them for daily babysitting of 4 kids is quite a lot.