SF will be leveled by 100 year earthquake.  

We don’t have any earthquake code here either so all different in different areas and people use the same words for different things.

No state income tax, grass to tend, no ice/snow, humidity/excessive rain, storms with names, floods, earthquakes but with reasonable to great property tax rates and less LL-tenant regulation. 

If there is earth quake and property falls into ocean or anything else that brings value to $0, you can at most lose 30% of property value 3) most investors do not irresponsibly spend the all the extracted value.  

Then the structural engineering, any requirements such as solar, fire sprinklers, that is required  per code, and possibly  earthquake standards, (depending on location), and all the sudden that circular tiny home is a million dollar project.  

I would have guessed it was a massive earthquake that might make that stuff useful living here, but if it's a virus, so be it.

This question is literally asked weekly.Start with no state income tax, cheap insurance, low property taxes, tile roofs, stucco siding, and low maintenance yards, landlord friendly and no snow/hurricanes/hail/major earthquakes, that should narrow it down for you. 

CA went through a deep dive after the loma Preita earthquake and the first War in the mid east and things got really bad.. they had 250 different properties  student housing senior  MHP ( land development that I ran) and of course apartments galore and they could not sustain and it all got liquidated and I found myself out of a job..

Are they retro fitted for earth quakes?

I’ll add:1- regarding earthquake risk, I’ve given that a lot of thought too.