Note that 70k for one person in SF is considered low income/needs assistance/basically not a living wage by hud.gov. The bare minimum is somewhere around 90k.

At about ~140k for one person, you will still have difficulty renting a single housing unit because you will not be able to meet % of income = rent calculations. I have experience with this (and unrelenting corporate managed rentals charging several hundred in nonrefundable application fees just to reject for low income at 6 digits..).