What "big picture"? Effort? Effort is free. Although, most act like it costs a million dollars an hour.
And honestly... if you think arguing FOR a point source tarnishes my credibility, then you're lost. I'd love to hear your thoughts on comps vs coax though. I bet my $100 coax front stage sounds just as good as your "not too shabby" stuff.
"SQ and substantial output." You think it needs to be able to keep up with a 5k sub stage to have those two? You reckon you need 150db @ 1khz?
But this isn't a dick measuring contest. And it's not about who has more money into their setup. The OP gave a budget and asked if it could be done. And it's a resounding "yes." Anyting else is just your personal opinion. And you're entitled to it. Even if it's wrong.