Your DD must include calling the state, county and city re any of them sending a shut them down letters from regulators re local sewage systems and wells.   

Once people find out if you stop paying it will effect their credit they shut down.

Before you shut the door on this- you (and us) need a heck of a lot more info to make a decision. 

However, stumbling upon this website via Reddit has provided some much needed resources for seeing this dream through, or shutting it down entirely!

Do I shut down the pool and cause neighborhood chaos? 

The seller got out of this seemingly impossible situation, got paid for the house, and a rehabber in the area got a great property that was ready to be flipped.The final takeaway from this story is: persistence, not just when 4 title companies shut you down, but when things don't go as planned in any aspect of your business. 

I tell them that if they don't pay it, their water will be shut off.  

So cities often have incentives to shut the park down, or at least make new zoning rules etc.

What are you looking to accomplish with the lawsuit, just to return your money or to shut them down?

Go there and winterize the house , shut off the water at the street , of if its a well its already no water .