Just got a chance to really look at what you've accomplished. Very impressive workmanship. Are you available for hiring out in the local area
Seriously, very nice setup. I'm afraid my own room will not stand up to yours. Mine is a media room with a 60" Pio Elite kuro plasma & a lot of space devoted to my choice of speakers, very large Magnepans planars. The speakers are what prevents me from easily doing a front proj/acoustically transparent motorized screen. I've been a Maggie devotee since 1982, so I live with my compromises
Over many yrs, I spent my attention & money on equipment (music is important) and far less on the room itself. When we moved here 17 yrs ago, I did have the builder build me a dedicated media room close to your dimensions, 13.5'x22'. Tearing the room apart & re-doing it for a true HT room would have been very painful & costly, since ours are load-bearing walls. The one thing I do miss having is in-wall equipment racks. I've done all my own semi-structured wiring with a lot of wall outlets behind my equipment cabinets & raceway.
It's really great you could do yours from scratch.
I'll be calling u soon
Maybe you can give me some pointers after seeing mine.
BTW - I see you're 57, we're not that far apart in age either, I'm 59