Got some news. The basement guy came in, we went over some things, and his recommendations were somewhat minor.
1. The foundation wall in the basement was somewhat cracked horizontally. The wall is probably displaced 1" inward. The ground outside has been regraded, but the mitigation is to place either steel or carbon straps on the wall to prevent it from moving inward any more.
2. Downspouts are all run underground on the property. Recommended to dig them up and put new piping in, down to the sewer. Unknown if they are functioning correctly.
3. Mold treatment/antifungal (this was done recently but they suggested doing it again but more heavily.
4. Industrial dehumidifier.
I think I can do items 2, 3 and 4 by myself.
Still waiting on hvac. Kinda anxious as there are 2 heat pumps and 2 furnaces on this place. Not cheap if all the shit needs replaced.