I'm very crazy. And been called worse. American's don't know how to save $$. Some, not all.
If I had 20-25k, I certainly wouldn't think about car audio. I'd make it more $$ so I can retire early.
The problem with Rex and other clown cars is that they get really loud with little cone area/power up to the point where you hit a wall where you can't add more equipment or batteries due to space limitations. Also if you want the impressive numbers they'll happen at 60hz or thereabouts.
My buddy just got one and they are awesome to drive. People just move right out your way because they think a cops rolling up behind them. It's nice to drive and not have people cut you off 10 times a day.