Many of the tenants here like/need/want fixed expenses, whether they are retirees on fixed income, or a mom-n-pop business that doesn't have the ability to weather the big swings. 

medium to high thread count cotton works in every weather, 100 % polyester is sweatier and doesnt seem to wear as well although it dries quicker.

I think this is more appealing to capital investors and better for me also as you never know what exact numbers are, although I do my homework and forecast the numbers pretty close.

Check the us census population forecasts and bureau of labor statistics job forecasts.

How's the weather in San Diego?

Economists surveyed by Briefing.com had forecast a 6.55 million pace.The group said that there was a 7.3 month supply of homes on the market, as all regions of the country outside of the South saw a year-over-year decline in median home prices.Nationwide median home prices are up just less than 1 percent compared to July 2005, after years of double-digit price increases.

If the weather is decent, they'll sleep in a vehicle in the driveway and use the house for the bathroom and kitchen. 

I won’t bring weather into the equation or the diversity or the various outdoor attractions.

With the short term rentals, while lucrative, poor weather, competition from other short term rental owners, and global pandemics can derail any plans you may have based on speculative income. 

Just make sure you have $$ set aside and can weather storms.