It cost half that in most south bay cities. For $5k you can easily get a 2000 sq ft 4 bedroom independent home in most south bay towns (except palo alto, los altos etc)
Note that a $5k/mo mortgage means a $1.2m+ selling price, for ~2000sqft. That's still insane (and doesn't include property tax, maintenance, utilities, or any of the other homeowner costs). Imho, anyone is crazy who thinks spending half their take home on a mortgage is acceptable.