All 3 companies took air humidity readings and moisture readings of the wood joists and warned me about the long-term danger of my floor joists warping since they are made of composite wood.

There's a chance they caused the moisture that allowed this growth and failed to report it in a timely manner, they are violating the law by withholding rent, and they are generally a pain in your backside.You also have to own up to your own mistakes and may want to consider hiring a property manager before your mistakes cost you tens of thousands.

There is moisture in the basement and a good bit of mildew and mold from the moisture far away from that hole.

This might can cause leaking, moisture, and mold.

Mostly just looking at siding materials, water barrier, and mechanical penetrations, since I can’t see the roof. 

I'm looking at a property in VA with moisture issues in the basement.

Moisture problems loss of heat?

On the 6th day since incident, a restoration company (Owner - myself present) assessed the water damage and advised  moisture still present in ceiling cavity and it cannot dry by itself.

Those screws will penetrate the metal stud.

Large trees close to foundation• Sunken porches or stairsWhat to look for on the inside:• Cracks in the drywall• Misaligned windows or doors that are hard to open and close• Sloping floors or cracked tiles• Cracks in the ceiling• Any separation between walls and the ceiling• Moisture in crawl spaces or the basement