Im starting a community of sorts for counter-strike players and I was looking to soon hopefully throw up a few servers. Now I'm not 100% certain what it takes cpu wise to manage them so Im going to throw out a few details and ill see what you guys think.

Im looking to run 2-3 servers 24/7/365.
Servers would be about either 18 man and a 12 man or 20 man and a 12 man.
OR if i can hold 3 probably 18 man, 12 and a 14. I'm not sure what server loads can get up to though so im asking for your opinions.

I'm unsure of my price range, im just looking for honest answers from everyone.