Looking for a Trophy Kart to Race! Maybe even Buy!

Hello all you bloggers!

Well, My son keeps bugging me to maybe get a Trophy Kart for him to race. He is almost 9 years of age. He really wants one to race, but I would like to use my buddies that he has at his race shop called Specialty Race Prep and for my son to use it before I buy a used set-up.

Well, what kindof cost is in this Trophy Kart? Like motors? How reliable are they? Safety (his mom will freak), what do I need to start out with? Should I buy a package that's all ready done?

Ok, some one please post something on here to help out. Or maybe where is a good place to do a few rounds? See if he REALLY wants to do this...