[yocto] Build Server Questions?

[nick]

Greetings Yocto Devolopers,
I am wondering if a build server is a good idea for Yocto Builds. In addition what specs are good for 
a build server if I am to purchase one. Further more I am assuming as many cores as possible for making
the build be parallel and faster. I was also  thinking as much ram as possible too, 64 GB as a minimum.
If there are any other ideas on specs for a build server that would be greatly appreciated.  
Regards Nick