Don't rest in the house, just enter and leave the house on the specified time until the event starts. You can rest when it's 20:00 to start over again the next day. Entering randomly triggers the event and it will prompt you to snoop or leave as the door is open and Ste isn't there to greet you like usual.
EDIT: Oh and one more thing I guess, I don't know if this matters but if the event doesn't trigger after entering and leaving the house, make sure time passes a bit, either wait in the gloryhole, check playground or wander around before going back into the house.
Like this: "Enter House" (If event doesn't start) > "Leave" > "Wander Around" or "Wait in Gloryhole" or "Check Playground" (I suggest the playground since it's just 15 minutes passing and without enemies) >"Enter House" again. Repeat until the event starts.