This is no barn, this is a palace. Or at least a mansion. Instead of the Surround Master this will be a Surround Mansion. Ricky's Surround Mansion. Yeah that's the ticket!
Since the B&W 802 D's are large floor standers, should I assume what's being built into the wall are the ATMOS height speakers? Isn't it recommended these be built into the ceiling?
EDIT: Oh, I get it now. Building subs into the wall. Seems like that would be a wildcard for all sorts of bass resonances.
Bravo on the selection of front projection for video. I have a smallish big screen of 8' with a Panasonic 8000 projector. Front projection is not always practical for a lot of set ups but if it is it's a superb experience. I would never have a direct view screen as choice for serious viewing.
Inspired by me my older son in law purchased a Sony projector some years ago & uses an Elite fixed frame 10' screen. I think where doable this is the sweet spot for home projection. My set up looks a bit better for movies & anime, his looks better for sports. My set up is quite cinema like & his is more like being there. You will be very happy. And when it comes time check out the choices of Elite screens. Much more reasonably priced than others. And setting it up is a two person operation & very scary scary the first time. But not only did it survive our efforts to assemble it also was taken apart & unlike Humpty Dumpty put back together again when he moved. So kudos for durability.
I like that your using a center front speaker even tho I consider this optional for music. But for movies, as was noted earlier, it keeps dialogue centered no matter where you sit in the room. I'm sure your Surround Mansion will be a very popular place so this will come in handy. And it seems in sports the dialogue almost too loud, so having the ability to turn it down a little & balance it out will make it seem a bit more immersive.
Random questions:
What the heck do you need two offices for if you are selling your biz & retiring?
And what are the lockers for? Wait staff to change in & out of street clothes?