I'm not qualified to design such a thing - if I were, I'd be doing that instead of talking on a home recording forum

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But I'll bet the boys at Bose might have a few ideas along those lines; they are keen on the idea of using tuned spaces, the use of reflective design, and similar acoustic tricks to get more out of small and less-than ideal spaces than would seem practical at first blush.
I'm just thinking that in a field where everything is already "outside the box", thinking outside the box means going inside the box!

Now, come on Travis, wouldn't HST be proud of that twisted logic?
Of course right now Harvey is doing a coffee spittake all over his keyboard, laughing and shaking his head as he mops it up because I haven't the slightest idea of what I'm talking about

. Just trying to make your day, Harv!
G.