I have a lot of theories, blah blah blah. Here’s another theory: it (economic depression) will end with riots in the streets of most large cities, and huge increases in crime, frightening increases particularly in cities like San Diego (proximity to Mexico, large poor illegal immigrant population). This has implications for housing prices.
It implies there IS a specialty sector of housing that will appreciate significantly more than most: homes buried deep inside the (presently) safest areas plus residing within WALLED zones that you can only enter at single gate manned with armed security guards.
You just described many developments in the Las Vegas area. Gated entry manned by armed guards is very common there. Unfortunately those homes have fallen in value just as much as everything else there has.
Speaking of Vegas, you can buy houses there for $20K! For real, go look.
As for the value of walled, gated compounds, unless they produce their own food, water, energy, and electricity they’re not going to do anyone a damn bit of good.