More anecdotally it is basically impossible to get a studio for less than $2k or a 1BR for less than $2.5k-$3k. I pay ~$1700 but have 1 bedroom in a 4BR apartment. If you are willing to live with roommates rent can start to become "reasonable" (assuming a $100k+ salary), but you're kind of screwed in SF proper if you want to be on your own and pay less than $2k.
Now if you are married with kids: 1. Hospital co-pays, premiums, co-insurance, $45 drug co-pays, everything comes to about $5k/yr if you are just moderately sick. 2. You cant live with roommates, you actually need your own home. Can you imagine raising a family with roommates? 3. You def need a car, possibly two.
Forget about saving up for a house, most will be $1m+
Some people will say -- "oh, you are married, now you have two incomes" -- sure, until you have kids. Then most of your second income goes to child-care, and in the early years, you will pay MORE for childcare than you earn!