> But you want to make big coastal money. That is likely double the hours on a weekly basis. Here are employees begging to limit work to 80 hours a week

You're confusing FAANG with investment banking. FAANGs for the most part are pretty cozy places with few people working excessive hours. Some even too cozy - Google is full of coasters and rest'n'vesters, practically a retirement home. Speaking from experience of working there.

100% go for a FAANG over taking up a second job, you will not regret.