When buying a gun and/or pervert glasses, yes, sounds very reasonable?

This, but it may also be apparent even without detailed information. The key difference is an absurd level of power density. So compare footprint to power. Power can be estimated easiest based on backup generators as their smokestacks are almost always visible. The last variable is whatever generator size from CAT, Cummins etc is the most cost effective, or that was still somehow left in a warehouse to actually buy.