How do you set up a live action breakout room or murder mystery game in a home?

Sometimes these are done in historic homes—its kind of like a live action game of CLUE, where a group of adults tries to solve a mystery (usually a murder) or—in the case of a breakout room, escape from a dungeon (a.k.a. like in the SAW movie series).

Its too late in the season for me to organize one this year, but I have friends who have adequate homes.

A decade ago, I did some really dark Role Playing Games for groups (Chaosium’s Call of Cthulhu, and also the Role Playing Game “Kult”)—these games went on for several weeks during midwinter. I would like to theme these events this way and possibly feature a dinner and coziness (“Hygge”) and breaking out into a horror mystery theme. Not taking a week but a quiet evening with friends.

I LOVE horror props, haunted houses, and the Steampunk genre. I have access to old houses, churches, and hopefully a retreat center.

So, how would one go about setting up a murder mystery or breakout game or live role playing game in a home?