Hardware for 7-10 windows 7 KVMs

My Apologize if this isn't the correct place to post this. I was hoping to get some advise on hardware. Here's the setup 7-10 windows 7 installs so remote users can access a program at main office. I was thinking along the lines of 6-8 cores 24 GB of RAM 750 GB HDD.

Any comments or suggestions? Would like to keep the setup as cheap and stable as possible ;).

Thanks,
Ethan