Carolina - 30k
Cedarwood - 3k (because of you're age)
Providence - 25k
Ballantyne - 25k
FWIW Piper Glenn is 5k, Firethorne is 12k, Raintree is 6k (2 courses though), and Longview is 75k.
I think thats it for the south Charlotte ones.
Anyhow, i have played Firethorne, feel it was ok. Most people ive talked to say its the worst layout of all the private Charlotte courses haha. But its a Clubcorp course, as well as Piper Glenn, and you have Riverrun up in Davidson. So at least you get reciprocal playing.