This is a pretty simple building actually and I'm not worried about a hundred here or there.

Focus on simple, predictable renovations and strengthen your network with wholesalers, agents, and contractors.

Zelle and Venmo-  Pro's:  Super simple. 

This entity is currently raising funds from investors with promises of 82% returns.Ron Fossum, dissatisfied with his simple, concealed role at Norada Capital Management, is also involved other business ventures, none of which appear to be legal.

You could use a simple move-in checklist or form for them to document any immediate issues.

They stay for a couple months without paying because they literally can’t pay. 

Too many people involved to do a relatively simple transaction.

@Nick Belsky gave you great advice.In this situation, best to keep it as simple as possible, and I often give two offers; first, perhaps an all cash (way below market) and let the owner know that it is what it is--a below-market offer.#2 would be the seller holds the financing--I wouldn't go to a 30-year amortization, especially with an 80-year-old seller. 

Of course, there is very literally entities out there who make there living via filling frivolous lawsuits than offering settlements at cost savings vs one fighting to prove innocence, and they target those "marks" based on such searches.     

My very simple K-1 was wrong too.