Here is my theatre..
Off the topic from the projector but one of the things I would have liked to do, had I known the importance of room color and reflections, in 1995.. is..
I would have used black or dark red carpet with the first 10' from the screen to be full black without design. Full black ceiling, with black acoustic panels. No stars or sky.,.. and for the Walls - Electric operated black drapes to close with picture but to disappear into large wall columns/pillars when lights are turned on.
Does not seem elegant, I realise.. hopefully your interior decorator can come up with a good compromise.. but with 2000 or 5000 lumen light output.. or any output for that matter, the room reflections are extremely important for good contrast - assuming that the quality of picture/video is paramount..
Please excuse me for this off topic post.. but I thought it was a necessary factor, while discussing 5000 lumen projectors.
Again, such projectors can emit a lot of heat.. If you do use a closet room/enclosure, with cooling system, try to avoid a glass (even at 45 degrees) in front of the projector.
Currently, I am using the Sony Qualia 004 with 140" wide stewart 1.3 micro perf. It's $6000 lens is simply amazingly sharp. I would recommend the Sony 4k, 12' wide 1.7:1 or 14' wide 2.44:1 so that you can change your projector in a few years to the laser units or LED.. As you know, there is rarely a "perfect answer" for such developing innovative technology arena.. Obviously, my suggestion is a compromise, for now..