I earn a lot here in London, but moving to SF would be a significant bump. However, I very much value my time off.
Officially, though, I (just found out that I) have 20 discretionary days per year (plus American holidays).
There are also all sorts of special purpose leaves (jury duty, infant care, bereavement, etc...) that can become quite substantial.
All that being said I’ve almost never had a boss who cared about tracking my vacation too closely, and I’ve never felt pressured to not take time off when I want to, other than a half dozen critical weeks a year.
The "unlimited" thing became popular in California in part as an attempt on behalf of companies to avoid having to issue payouts for accrued time off to employees leaving their organizations.
I'd suggest simply being very up front and specific in interviewing and negotiations about how much time you plan to take and see what kind of reactions you get.