My searches have led me to explore various parts of Indiana, Tennessee, Ohio, North Carolina, and other states - mainly because my criteria is accessible at my target price point in these states (I plan to purchase conventionally).Ultimately, what is the best location for me to hone in on deals? 

Go pound sand if you won't show me a property.

Additionally, you could also prevent this "middleman" for potentially targeting another buyer.  

So search areas where comps are 100k and target the dilapidated houses.

If the town where the PO box is at is somewhat small, you could run a facebook ad and target everyone who lives in that town.

Good luck finding a place like this as there is very high demand in Denver.Once you find a location with the correct zoning, if that's the industry you want to target, you're going to have to upgrade electrical to the warehouse.  

If you keep the house 6 months and it becomes self supporting and hits your target as far as cash flow ( you set that goal not just accept what it decides to pay you) than its a win for as long as it's self supporting and cash flowing. 

The marketing campaigns, direct mail, IP targeting, direct phone calls, will all stop in that area and we'll look for another area to develop. 

You didn't include exactly why that particular company was targeted.

6) what is their target DSCR (Debt service coverage ratio)Most banks require a 1.25 DSCR or better on a property.