Not to mention I make every effort to document and stay on top of maintenance. 

It takes a lot of effort to learn all that.

I just took a rough DM seller lead call "I will kill you, kick your *$, etc" and wanted to increase my efforts rather than slow down.

I might check with a lawyer about the firing of your original realtor- last ditch effort.  

You could end up like I did on that one property where the income drops so low that it only covers payroll, maintenance, property taxes, etc or you might get lucky and only experience less cash coming into your pocket than you are used to.Rising rates AND a bad economy would be an anomaly and likely wouldn't last, as monetary policy would likely reverse rates in an effort to stimulate the economy. 

They would like to use the proceeds from the sale of the house to kickoff efforts in real estate investing.  

If I am a multi state operator, I might welcome a Lonnie Dealer in Missouri where I have only a couple of smaller communities, and discourage Lonnie Dealers in Illinois where I have many communities.If the community owner has any real knowledge and understanding of how certain laws can affect them, they are going to want any Lonnie Dealer doing business in their community to be legal and compliant in their efforts.

Also, according to the executor the house can not be sold or rented because the state controls the property; and the state is the only one who can sell it, in an effort to recovery money owed.   

However you might want to prepare yourself for a big eviction and foreclosure effort with the properties you can purchase through heavily discounted non-performing notes. 

If you don't mind putting some effort into finding good information, it's certainly here.