Bicoastal

Sometimes I'll see a picture of San Francisco or get an email from a friend out west and I'll remember how much I really do like SF...not enough to settle there for the rest of my life mind you, but enough that I wish there was a way for me to be completely bicoastal. Isn't there some sort of job or life out there where I can basically live part of the year in NY (spring and autumn) and part of the year in SF (winter and summer)?