Or, consider starting a company outside of San Francisco. Not just outside of SoMA, actually outside of San Francisco. (I know, I know, blasphemy.) Eventually the price of real estate and labor will be so high that the relative disadvantages of other locations will not matter.
They went up and down sandhill road/SF, and got a couple really lousy offers for funding, and were shocked at how harsh the VC community can be.
Their board member (one of our closest/best mentors) recommended they go back, but make the first slide in their pitch deck "We're moving to San Francisco." They got five term sheets in the first two days, ended up raising from a top-tier firm.
Yes, this is anecdotal, but no, this is not an exaggeration. You can raise money being unwilling to go to the bay area, but you have to have a really compelling vision/growth rate. People have to be fighting over you.
VCs are weird.
Oakland or something may be a different situation (not sure if doing the South Bay thing would even save you any money - Palo Alto ain't cheap), but anecdotally people in Utah get told the same thing again and again. You can stay in Utah, and costs will be way lower, but you'll probably pay for it. (Note: our company is remote with headquarters in Utah)