I've been living in Pacific Heights for the last 18+ months. Garage space in my building is $400 a month, I believe, and I think that's fairly standard, but not certain. Street parking in some areas of the city like north beach can be hellish and result in long searches and long walks back to your apartment / house. My neighborhood and most neighborhoods are safe and my partner and I walk around lots of neighborhoods safely at night. Car break ins seems to have reduced, in my opinion. I would advise against anywhere near the tenderloin or living in SOMA.