Rule of Horror #81: Always ask why the house is being sold so cheap.
I'd consider $200 rent falling into that category, which puts us potentially in the supernatural sub-genre, particularly the sub-sub-genre dealing with entities rather than creatures. Among the surprisingly short list of paranormal horror films set in New York City is Rosemary's Baby, Dark Water, and the Devil's Advocate, as well as Dario Argento's 1980 cult classic Inferno which, due to its connections to Suspiria and the not-really-a-twist ending,
could also be considered paranormal.
So here are my questions: Has anyone checked the water tank and has anyone found any strange old books written in Italian yet?