Then when you take over the building, be hands on and a good communicator.

The first thing to consider is how is your communication with her?

Sounds like she may have been (a little too brusquely) trying to communicate that? 

The close went great and communication with everyone was great until after the property closed and I awaited my first statement and rent payment from the property management company. 

Also save all communications and show them to code enforcement and hold them for a possible law suit if the mold is toxic.

They've been difficult to communicate with so again I am frustrated and started talking to my family members about this.

Then call them and make sure that they are content with the process and that the communication process is adequate. 

🧐You need to communicate very effectively and more precisely, almost with surgical precision, what the seller will get out of this deal such as:- Some money upfront- Money every month for the next 3 -  5 years (however small, it is coming in)- They get a big check in 3 - 5 years or even as early as 6 months or 1 year - You promise to carry on their legacy by restoring the house its original glory!

It all comes down to communication.

Further communicating with current owner, there is one main meter which she is responsible for.