Option 1:

You are right on the money with Slip McScruff being business minded, but you missed the golden opportunity staring us in the face. This isn't just any regular haunted house, this is the Haunted Hockey Hall of Fame.

Slip is going to milk this from so many different angles. First, we have the regular crowd of haunted house enthusiasts. We have bonafide ghosts, so we get bonafide haunted tourist traffic. Celebrity ghosts draw celebrity ghost debunkers as well.

Second, we have the crowd of hockey enthusiasts. While Slip happens to live in the middle of nowhere, you may remember from point tasks a few seasons ago that he converted his whole neighborhood into a walkable hockey compound (side note, this may well be a year ago, my long history of point tasks bleeds together). It's a paradise for the hockey tourist with a unique twist of hockey flavored ghosts.

Finally, we have the whale crowd of wealthy hockey players looking to step up their game. Slip will rent out his former bedroom for millions to fellow SHL players looking to get divine intervention in their game. Additionally, there is a secret log book where the players can share wisdom among each other. We bring them in with ghosts and then start a self-help cult for athletes.