Does one recommend that a 16 year old drop almost two grand on a car stereo system? No, I would not either, and I still think of that mistake that my friend made when selling his shares of stock to set up a new system in their older Camaro. What made things worse is his car started wearing down a few years later and needed more TLC than he could provide. He ended up within a truck next and decided not to transfer his system to the new vehicle.
When you want a nice system in your vehicle, it's often far better to make smaller changes to what the vehicle already has in it. Why? An older car doesn't need a system worth lots of money. A newer car may have a nice system, and you could just want to add an amp, equalizer and a couple subs. And by the way, those subs won't need to be 12's.
In fact, one good 10" sub would do, which means you don't even need to have a set. Speaker quality does come into play, so you might not want to select the cheapest speakers. Still, locating a system in your vehicle doesn't have to be extremely expensive.