Sorry, not 100 ft, more like 60 ft. It's a large room full of clutter now but I can appropriate a corner of it for my new home theater. Fortunately it is pretty dark (as it used to be a garage) and so light control won't be an issue. I can leave cables and stuff all over the floor as I'm not concerned with how it looks really, just how good the experience will be with decent gear. I figure the screen will probably be around 120" or so and the main seating position 12 to 14 ft away. The back wall is 60 ft away from the screen the the other side wall is about another 20 ft as well.
Room dimensions.pdf