Or even two Model Ys, for the same money, because while 2x purchase price is over $100k, the TCO is so much lower than for an ICE car, and it’s really the TCO (total cost of ownership including everything after purchase) that matters if your worry is affordability.
So assuming two parents, it works for people with up to five kids, or if they have two drivers in the family, up to 12 kids. Most families have fewer than 12 children.