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. 

After many years and many properties, we've been through a series of adventures (and misadventures) worthy of a Hollywood script--including flooded rentals, earthquake-caused property condemnation, unexpectedly canceled contracts, and even having to navigate a felony-level crime committed at a property we had under contract...but those are stories for another day...Now, to answer your question: I spent about 1 hour with my agent on a Monday going over my goals and learning about his process...that Thursday, we spent about 8 hours looking at properties and making our offer, and we were under contract that night...so, it was a fast-paced process, and much quicker than I had expected (but that had more to do with the breakneck pace of my local market than anything). 

For instance, you or your love ones get diagnosed with cancer or serious illness, become disabled and need 24hr care, get in a car wreck and get sued, the bank closes your lines of credit (yeah I already said this but this really made me mad with a 780 credit score), the market crashes, you get divorced, a riot or hurricane or earth quake or flood wipes out or damages most your properties, and the list goes on and on.

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..

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. 

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.

That big earthquake in San Francisco didn't help either.

As a young man trying to survive in America, the Army took me all across America, Haiti, Egypt, Kuwait, etc... these days I travel for leisure in and out of country.

Are they retro fitted for earth quakes?

In case of real estate, you are one big earthquake (I'm from California :-D ), or hurricane, or flooding away from being wiped out.