Gaming Server Setup

Hello Guys ,

I was looking to set up gaming server(s) to host for my gaming group. I've got a budget of around $1500 - $2000 . Please suggest me a config capable of handling 4 - 5 servers ... if possible even more . the games i'll be hosting will include BF3 , COD:BO2 , and other top FP shooters . i dont need a 24/7 server .... just maybe 12 - 14 hours a day and can be off on weekends .

Thanks !