rent in the bay are is high, but 2500 get's you a 3-4 bed house in the east bay
You're missing the big picture of real estate: Equity.
When you pay into a mortgage you can sell the house or borrow against the equity. When you pay rent, you build someone else's equity for them. This person already has enough wealth to buy to pay the insane prices of houses in Silicon Valley. So the rich person is getting richer, and the poor person is going nowhere.
but you don't have many other expenses, silicon valley companies feed you, offer transportation, etc etc.
That was tried before in the coal mining towns of West Virginia. It doesn't turn out so well for the workers. See these. You're just skipping the pointless pieces of paper and instead presenting a company ID.