Some old abandoned houses are found to be amazing time-capsules. Others you can research and find why people left so much in a hurry and it's sometimes sad stories or horror ones.
Although, what puzzle me, is why aren't these abandoned houses or commercial properties not demolished and the lands made available for people to build new homes or new businesses. There were two properties (semi-detached) which suffered a major fire aka only the walls remained, took over a decade to be fixed.
Blocks of abandoned flats took twice as long to get shifted. I guess the haunted ones would take the work/hobbies from the Paranormal researchers... Who knows?
Some are really in good shape and could be made habitable and made available to get homelessness sorted, it would be something to consider, yes?