'The
idea that the majority homeless Californians are 'migrants' from out of state is largely upper class propaganda promoted to avoid discussion of downward mobility caused by high land prices'.
This, like so much of the political data wars over SMI, SA & transients, is partially true in coastal California.
The reality is usually found in non politician friendly audits such as the Sonoma county grand jury findings or the recent California wide audit.
https://californiaglobe.com/section-2/state-auditor-releases...
http://sonoma.courts.ca.gov/sites/all/assets/pdfs/general-in...
California has huge numbers of vehicle living transients who understandably migrate from colder and hotter climes across America, half the US homeless according to the recent audit.
The bigger issue locally in California is migration from places like Redding down to the bay area, encouraged by the street grapevine about prop 47 lack of law enforcement, rich pickings and relaxed drug rules. In San Francisco drug dealers are commuting in from the central valley with Meth and Fentanyl, the current core are Hondurans.
The best way to find out what is really going on is to talk to homeless people, ask them where they are from, talk to local emergency response crews and find out about HUD oversight of Continuum of Care, who in turn are supposed to provide oversight of the CDC. I strongly recommend taking politician and 'non profit' pr and stats with a strong pinch of salt...