Don't discuss the mold with him because he obviously didn't provide evidence or the opportunity to remedy the situation. 

One question I got from an investor is whether an unfinished basement should be tested and remediated. 

Start by giving them notice of what they are violating and then if it isn't remedied, start the eviction process. 

We'll see if the remediator has any solutions before I sell "as is". 

You may also need a fire remediation specialist to assess the damage.

Minor termite remediation as well.

To remedy that, the carpets should be ripped up and sealant applied to the subfloor, at minimum.There are also tiles in the smaller upstairs bathroom that are lifting up and creating a safety hazard; putting a rug on top is not a sufficient solution.The house is in a condition that materially interferes with the health of household members.

This allowed me, for example, to purchase an automotive repair facility with an environmental issue thru BK court for $115,000, remediated to issue for $2,000, and sell the property for $325,000.  

FHA usually is a lot more stringent when it comes to repairs needed and the seller has to make these remedies or the buyer won't qualify for financing.

Depending on state law the buyer will have a certain amount of time to remedy this violation of covenants.