Little things that can add up to  be big things financially like garbage, water & common area electrical, landscaping.   

Yes Tornadoes are more common in the midwest but yet are still very rare events, much less a F4 or F5 tornadoe capable of mass damage.

Population Growth in United StatesSeries : US Census ACS 5 - Population Estimate (2000-2018)Population growth is one of the most common and important measures when doing due diligence for Real Estate Investment.

Is this common with mortgage lenders or will other lenders potentially be more flexible?

As you know, it is very common for exchangers to complete their 1031 within the 45 day window. 

It's more common for their policies to discourage RE speculation rather than encourage it.  

Is it common for realtors to not pursue a buyer for no apparent reason?

Given the lots are on a mountain, I'd expect wells to run more expensive and septic to be average given how common they are in the area. 

I believe looking at properties on common websites like Zillow and Domu would be saturated.

It seems pretty cheap to skip something so common.