I think it’s a good test for when you have real repairs and property issues.

You can target buyer keywords like agents near me, best agents in {your market}, etc, which is probably your best bet if you are convinced on testing ppc. 

The thing that caught my eye is that @Scott Kunz mentioned he might have a tool to sell after testing it and I think for the the cost of development that he mentioned, about $400, it's a great idea to develop what has the potential to produce as much income as another STR.  

But also try to get more info from the realtor. ask him why it has been for so long and and is there something wrong with property  etc etc, or just move on , I typically don't force the gate to open if they want to keep it close  ( metaphorically speaking) Or maybe that's the agent strategy to qualify who he is speaking with and want to test the level of interest or quality of buyer..  

Only thing unexpected was before issuing the permits we needed a sign off for  a septic system inspection showing it was not fire damaged and the fire department had someone who signed off that the foundation was not impacted from the fire.We had to redo the water line to the house.We also had to have inspections and testing of various burnt materials for asbestos.   

Test was a breeze. 

@Joe HammelCeiling mold: inspector didn't test for it, but pointed it out and definitely looks like mold.Fasica: All the fascia needs to be replaced, but likely because there are no gutters on the house.

There is a substantial improvement test these properties must meet you can read about it here  https://www.irs.gov/credits-de...

Some of the surrounding properties have tested positive for slag so fingers crossed the test comes back favorable. 

Example, when we buy land and pay for environmental test, whats happens if the land is not able to be developed?