What does your partner think about the two schools/cities? I think them having their family nearby can be great since one person in medical school can be trying for you both (although if you've worked long hours at a job previously, I'd imagine it's completely bearable)
UCSF does not have an undergraduate campus since it is exclusively a graduate health professional school. Our class (c/o 2020) has a good amount of older, non-traditional students although only a few that are married/have kids. Would be happy to answer any questions you have by PM!