This nothing more then being bored. With all the time effort and money people spend reinforcing there vehicles to stiffen every thing up in hopes of containing the bass and getting every last dB. Why hasn't anyone ever started with something ready reinforced? I've seen a few armored vans over the years you could pick up a old f650 armored van with bullet proof rear, doors, windshield diesel powered easily turning as many alternators that'd fit under the cavernous hood. I'd think it would be a hell of a head start