The number I see bandied about for one-bedrooms in Richmond/Outer Richmond is between $2,400 to $2,600/month. [0] Given that you're goddamn not raising a family in a one bedroom [1], I'd say avitzurel's rent estimation sounds fairly reasonable, and definitely below average for the entire city. [2]

[0] http://priceonomics.com/the-san-francisco-rent-explosion-par...

[1] Especially many of the tiny places that pass for "one bedroom" apartments in the city these days.

[2] Of course, the trick is finding an apartment to house your clan.