Doesn’t take a detective to find your drivers license or utility bill names, a lease, etc. 

Was this potential problem detected during the inspection and due diligence period? 

Might not be a good solution for your property but sometimes changing the type of heating system can be a good move.I’d say your on the right path, have water detection, educate tenants on what to look out for, and have some one available to rapidly respond to the situation.

Daniel, thank you for your great detective work in eliciting information via your statement to Gino, "Sounds like you're confused.

I also told the lead detective from the p.d. about it when he was at a Ducks Unlimited meeting 3 weeks ago.

Some molds are visible and odorous; others are harder to detect.

There is no leak detected.

Great research by the way, you may have been a Private Detective in your past life.

For future, you can add an alarm to detect any water on the ground.

A couple of years later when we went to collect the rent from the parents an ADA was there with a couple of detectives with active warrants in hand looking for the young couple.