回复：比你少挣25%， 50%， 75%的都能负担

I know. If I make less than 50k, I am sure it shouldn't be a problem. My frind's son went to UPenn a few years ago.  he did not pay anything, because he is postdoc. If you make over 150k, it is real problem. You may be able to afford it, but your quility of life gonna dramatically drop. not even mention 2 kids (130k per year!!!).