I've done this off and on for the better part of two decades. I know a few good colo's across the US if your interested. Much of it is going to depend on your

I've done this off and on for the better part of two decades. I know a few good colo's across the US if your interested. Much of it is going to depend on your workloads. If your just running emepheral vm's on something like vmware or another hypervisor, you won't run into much of a problem. Things start getting a bit more complicated if you are going to be using HA storage/databases. But again, that depends on your workload. And some datacenters will be happy to manage that for you. There is alot of money that can be saved when your workloads are fairly static though. The key is putting together some hardware automation (jumpstart your hypervisors) and handling the depreciation cycle.