Power move
Power move
You answered your own question, no?
If he spent $8 million on that in SF, I don't think he would have gotten nearly as far.
Heck, you can make decent money and retire in your 30's if you are little care about how you live your life.
That is how most millionaires/billionaires are made. The start up riches are an exception to the million dollar club. Everybody else goes through a pretty difficult grind until they make it.
Billionaires are billionaires because they've made amazing investments or have created companies or products worth billions. That's it. It has nothing to do with how they deal with their cost of living.
The folks with $10, $100 or $1B got there by either building businesses, getting incredibly lucky (lottery winners) or working as top execs in big companies.
For them, the sacrifice is not of money but of time. They don't wonder "gee, should I brew my own coffee and save $1000 every year?", but "gee, should I work on this deal right now or spend time with my kids?"