However, the metal and concrete/masonry that remains in good condition should be ok.

He has metal sheeting nailed to the roof to hold the tarp down because of heavy winds.

I need to find a better solution for both concrete paint/coating for high-traffic areas and flooring (I have had tons of issues with LVP with water from entrances and separation and unlocking), and I want to know if it is worth spending the extra money on metal roofing due to its durability.I look forward to hearing about your experiences!

Today my neighbor/tenant crashed into the wrought iron fence that fences off the property, warping the metal and causing a few problems.

His metal shop that he works out of is in the garage.

Insurance is generally the best way to recover in the event of a loss, but most contractors carry insurance that only covers property damage or bodily injury liability meaning even if you are successful and obtain a judgment, you are reliant on the GC to make good on a payment. 

I decided to get an inspection on both properties pre drywall and my inspector found several issues from warped roof trusses, all steps un-level, damaged metal wall framing, un-level flooring and un-level concrete flooring.

$21,000 is not accurate, unless you're planning to put in a metal roof. 

I have a service dog, and you'd better believe I'd consider litigation if I met all the requirements and still wasn't approved because I have a service dog.

They did do some large cap ex repairs like all metal roofs and burying the power lines but they didn’t do anything to bring people in like building a nice website.