[mdeg]

Your tax calculation is low I think - looks like $250k would put you in the 33% band, let alone any other regional tax calculations.

$60k/year spending for the rest of your life is very ambitious for a high CoL area. I don't think you're accounting for medical insurance, car ownership, home ownership fees, children, a spouse that earns less than you, etc etc. Costs go up as you get older.

I also don't think you've accounted for inflation.

Please also keep in mind that huge Google/Facebook/Bay Area salaries are a historical anomaly and will not persist throughout your entire career.