Then they begged me to take this pile of slight edge damaged culled fireproof drywall.

Like I said above, let's just pause, do what we can do for damage control. 

Turbulent Financial Markets Make Real Estate Relatively More Attractive: Although lost wealth is expected to have negative impacts on higher-priced properties, the fear that financial markets could fall further could improve the prospects for real estate as investors seek safe havens for their assets.

I'm just over in Huntersville- I actually was just under contract on a house in Concord too but the inspection turned out more foundation damage than I wanted to deal with. 

Definitely look behind the sheetrock to see what is there.You can use a 'see-snake' without much damage to the wall--about a 2" diameter hole.If you see the back of the other apartment's sheetrock, you've got a problem.  

One thing that I would look into is adding a bonus/damage plan.

We have found that property damage is common and tends to be expensive.

I am “guessing” (haven’t seen the actual damage) that repairs would cost around $5k to one of the trailers.

I can say this is far more damaging on the travel/STR rental category than 9/11 was. 

After telling a few friends and relatives in the local area that I would be interested in selling the house I heard back from one prospective buyer who is interested in the house to fix up--it needs about $2k of work to get it up to a decent level--and then sell or rent-to-own to an interested party.