But the real kiss of death was their arrival and documentation (with photos) of the poor & inconsistent cleaning.

In the “old” days, people would have the seller pay the lender so as to not “alert” the lender that a property sale had taken place, so that the lender def wouldn’t trigger the so called “due on sale” that’s a part of almost every mortgage or deed of trust document.  

The way to get access is typically reaching out to the sponsor and getting the PPM and the documents you need to do a thorough review.

It also allows you to manage paperwork and document communications with Tenants. 

As of now, we have zero documents in the portal.

No doubt; both of my neighbors at my vacation house got "free" roofs from guys who roam around after any storm and document that whatever storm damaged their roof - despite the fact they both had 15+ year old 3 tab asphalt shingles in the central Florida sun. 

It’s becoming increasingly frustrating—the seller refuses to provide any proper documentation.

I don't think anything is 100% sure, and all the documents all the syndicators have you sign will melt your face off.

Be transparent and document everything.3.

They cannot continue a lawsuit on your behalf if you have not authorized it.I would send them a short demand:"You have five business days to stop the lawsuit and turn over all documents, funds, and anything else pertaining to my property.