What exactly is KVM software?

Anyone have any idea how much a DC like TP would pay for exectricity/power and how much their overall running charges would amount to?

What would be the initial startup costs for a private DC, i.e. paying for pipes to your DC from a provider, buying backup power sources, fuel for backup power, servers, racks, software and other things.
Not for a commercial DC with servers available on the internet, like TP and Ev1.

Thanks!