They make anything and everything out of metal. 

Personal Liability: For claims due to Bodily Injury or Property Damage that you becomeLiable for and which is covered under the policy.

There are differing opinions on the the ability to amend your LLC Agreement to include the purpose statement with a retroactive effective date, but it certainly gets more difficult to justify if significant time has passed.Assuming you actually have gains within 180 days prior to the date you invested your money in the LLC, and assuming your LLC met all of the requirements for the properties to qualify (purchased from unrelated party, meet the 50% "substantial improvement" test, etc.), there are some that could tell you that qualifying your existing LLC could be an outside possibility depending on your tax risk appetite, but I likely wouldn't recommend especially if you have already filed 2018 tax returns. 

It currently has a metal tin roof. 

Metal is not an investment.

Our company was looking for a small multi family fixer upper and this met all the criteria and it was in an A+ location.

You would have to go through the trouble running a metal flue, when you already have PVC right there.

-central air register to the room- on the attic side, the sheet metal is wrapped in some kind of joint compound white stuff.

It is an iron on strip and you just use a regular clothes iron to put it on and then clean up the edge with a metal file. 

@John Collins  Somewhere they should be a metal box on the wall that houses all the electronics.