Really just one, but that one assumes moving away to a particular location. If we couldn't make that work for some reason, there would have to be a higher number for staying put in Southern CA, but I haven't determined exactly what that is. Probably an extra $400-500 thousand to cover the house price and tax differences.
I've mentally toyed with going FIRE while DW kept working while remaining put, in case she decides that she really can't leave this area. Of course, I want to leave this area for reasons beyond just money, so that wouldn't be my preferred solution even if it meant earlier coastFIRE for me.