Usually, the excessive moisture is caused by a leak in the plumbing system underneath the floors and it is usually a hot water pipe leaking.I am a contractor and sometimes I find that the clothes dryer vent is broken somewhere and all the steam coming from the clothes as they dry is going inside the house and collecting on the cool glass windows.You can hire a contractor to look for a leak, or you can purchase a hydrometer online.

Are the requests valid (ie is something broken from wear and tear)? 

@Shawn McCormick thank you for the tip and willingness to help!

This idea is like a Rube Goldberg machine built out of broken Ritz crackers and pick-up stix.

If so any best practices to follow or tips would be greatly appreciated.

As a first time owner, any other tips or thoughts would be much appreciated as well!

Good tips and advice for sureI just mentioned cash for keys as an option, just seeing what everyone would consider my best option.

Thank you for the tip. 

Thanks for tips, was easy to confirm 👍.

Any other tips?