Read Moore's law, the loss of hardware manufacturing is still being felt (semiconductor shortages etc)The diversity of cultures, ideology, economics, climate, topography etc.is immense.

There are a lot of great deals in my area on manufactured homes (double wides) on private lots in rural areas which is a big plus in my market.

Used to be the beacon for around the world in my grandfathers time (#1 port in the world, center for manufacturing, etc.).

The lone 3 bedroom is a manufactured home from 1990 that is a fixer.

We are one of the few US manufacturing companies left in the curtain Industry.

First point, medical supply manufacturing and supply.

This is a massively complex issue, spanning law, epidemiology, economic, healthcare, finance, politics, manufacturing...areas no one person can have mastery, with far reaching second and third order effects that can't be encapsulated in the low fidelity ideas of "Shelter in place= the only option" or "give me back my civil liberties NOW rah rah Ayn Rand" Complex ideas require the ability to be nuanced and understanding that the other side may also have a point of view which you may not agree with because you don't comprehend it well.

I have a handful of mobile homes/manufactured homes in the San Antonio, TX area. 

My new interest is investing in manufactured/mobile homes, and mobile home lots/subdivisions.

Many of the units you'll find on your flips still use Freon, which is no longer being manufactured as of 2020.