And in the short run, you can charge with 120v if you plug in when you get home and don't unplug until you leave for work. I know it takes longer in the cold, but most any bay area commute can be recovered from the 5+MPH that 120v charges at, that's like 75 miles of range overnight, and then on the weekend you can catch up if you have an even longer commute.
I did the install myself, there was a space open in the breaker panel, just had to remove the cover plate with plyers. Added the 60 amp breaker, and wired in a length of Romex straight into the bottom of the Tesla Wall Connector. Got the cheaper 6/2 two-conductor Romex wire as the third conductor in 6/3 is used to get the neutral connection which the charger doesn't use, almost 1/3 less cost. Once it was all connected I put the breaker in place and put the cover back on the panel. Almost as easy as plugging in a lamp.