It is generated by real factors that can be researched and are quantifiable: NIMBY'ism, building restrictions, business expansions of many different sectors, rent control, etc... 

You are spot on about your description of some of the town squares and business sectors of the area you visited...especially Arecibo.

., What you're describing is the prototype situation to use a 1031 exchange to change sectors/geography. 

Oils will definitely be a key product especially with all the vape pens and ecigs where you don’t need a giant setup to be able to have stronger concentrates.Think that still bodes well for the warehouse sector though because you’ll have to manufacture it somehow and at scale you’ll need bigger machines

Interestingly according to according to the National Association of REIT (NAREIT) the self-storage asset class also outperformed other sectors in the most recent recession. 

Why do so many investors consider landlords to be a special sector of the business community required to place our customers personal life situations ahead of business concerns.

Today, these same people are most likely working in the service sector.

What's your targeted property sector?

There IS an over saturation in the apartment/condo sector, and SFH is a great way to go because it appeals to a broad section of the buyer market.

Nobody would think of trying to 'invest' in other sectors with no money.No money index investing.