From experience I do believe in demon hauntings and possessions. Once invited into a place, a demon can attatch itself to and possess that place.
From looking at this picture though it does not feel
demonic. There seems to be some negative forces so precautions would be wise.
That being said, does anyone else see the figure of a man in the upper doorway? I had to enlarge it but could make out what appears to be a figure standing in the door. Look just over the rail. It could be an anomaly. Not sure.