Have to admire the man's dedication to creating his "ideal" sound system. That said, I share skepticism that the set-up will really sound all that good in that space. Would love to have a chance to listen first-hand to it and find out, though! :yes:
As for those horns being noisy in the rain, with stray cats, etc... that's a good point. They need to have a shelter built around them, preferably sound-insulated.
That comment about kitchen ware isn't far off the mark. I used to have a very early espresso machine that looked a lot like those tube amps. Had real mica sheet insulation and old woven-cloth wire insulation, etc... with ebony (pre-bakelite?) handles, made in Italy. Bought it for forty bucks from an old man who thought it was an old gas lamp (!) and sold it for nearly a thousand dollars to a restaurant owner who collected early kitchen gear.