But if you can live in a cheaper place than Palo Alto, you’ll make back that $15K per year in lower house payments. And if you only have a comfortable commute of 15-20 min each way as opposed to an hour (or more), your standard of living will be much nicer too.

Perhaps not. A recent study (can't remember where, but industry specific) proposed that EVTOL economics--at scale--will settle at a CASM of $3. (CASM = cost per available seat mile. Note RASM, or revenue per available seat mile, will be higher or these businesses won't make a profit.) With a CASM of $3, this study showed that only 0.03% of the Bay Area will be wealthy enough to commute on these vehicles on anything resembling a regular basis.

House prices will adjust once air taxis take off (no pun intended).

Bay bridge toll + gas + parking + amortized car ownership + insurance is pretty plausibly less than that already.

You will have less mobility than with a car, though,so it won't replace all of it. But I agree with your main point, the actual premium will be much lower and probably worth it, considering the time saved.

There's likely a reason they picked Switzerland, Munich, New York and California as examples ;)

I'm interested in how those prices break down. Without any more details, it's hard to know if they're realistic at all.