In simple terms, that is a lot of sg. ft. and cu. ft. To obtain the sound you want. Man I would die for that space, under 2K for what you want to hear - volume, and quality, is not realsitic, I think that's why taking steps is the suggested.

Sunfire amps & processor Sammy 50" Crown amp 2-SVS SS Maple Ultras, Axiom 60s,22s,150cc, QS8s