This feels like a good average globally, right? You have multiple staff per room (hopefully!) + admin staff + cook who need to pay their own rent+spending, then add the costs+mintenance of the daycare itself. Unless government-subsidised, I'd expect the daycare costs to be in the same ballpark as the local rent.

Assuming grandparents are local or unemployed and willing to move. And willing to do the work (maybe including food?)

Labor aside, a 2 bedroom in Mountain View is quite expensive and doesn't come with learning materials, toys, classmates, etc.