I am a NATIVE San Franciscan and have never paid the crazy rent that many do. First of all, DO NOT contact Trinity management. Look at their yelp reviews, rumor is one of the reasons SF has rent control is because of the owner. The trick us natives use, and other smart shoppers, are in-law apartments. These are found in neighborhoods like the Sunset, Richmond, Excelsior, etc. Are these the SEXY San Francisco neighborhoods that tourists come to see? Of course not. But dive bars, easy parking and access to some of the cities best chinese restaurants does help.
I have a few I can refer you in you're in need.