That #1 strategy - buy a fixer - is a great idea that not everybody understands. Buying low (i.e., fixers) significantly reduces operating costs (i.e., property taxes).
Here is one more line item for your list: look at neighborhoods that have historically retained their values during recessions. I have noticed that many areas that are least volatile during recessions also have the largest long term gains. Even within zip codes, different neighborhoods have significantly different value rentention characteristics. You may pay more for this sleep aid.
As is now clear from Prop 19 and the massive forecast budget deficits at state and local levels, Prop 13 remains a huge target for state and local electeds.
1031 exchanges seem to be impaired by Prop 19. With two children (my heirs) and multiple units, I am harmed by Prop 19. I am upset that the state deceived voters again to increase tax revenues and real estate broker commissions. As a "side hustle", and in response to Prop 19, I want 100,000 Millenials to become real estate brokers and chase ambulances.
What clearly has changed since 2002 is that we have become a one party state and rolled out the welcome mat for half of the nation's homeless and even larger shares of other states' drug addicts, mentally ill and child molesters. And within California, we have concentrated those folks in Oakland, Berkeley, etc.
One of the long term consequences of widespread aggressive rent control has been to concentrate large populations of low income renters into high cost areas. This in turn builds momentum to pass more rules and fees on landlords and homeowners. If and when interest rates go up and property values (and tax revenues) spiral down, I think Bay Area real estate investments (and governance) will become very unattractive for at least a few years. This is because many cities, like Oakland, will use franchise fees to maintain the same or increased budget levels. In other words, they will effectively and legally add pass through fees on utility services (just the privately owned services) to replenish their general funds. Oakland has already begun applying franchise fees to waste collection.
But I am not selling yet I may even try to buy distressed properties from distressed small multifamily owners (owner occupants) before the TOPA zombies take over that market.
As long as the US Senate is controlled by Republicans, fewer and fewer subsidies for affordable housing will get approved because most of the rest of the US does not want to continue throwing money at new units in California that cost nearly $1 million per unit to build. That means more upward pressure on rents at existing rentals.
The rodeo is not over yet. My bell may get rung while I wait for my bell to ring. But in the meantime, the hazard pay is pretty good.