I am in a colo in houston. I want to offer private cloud to peeps. I'm thinking that starting off with two ESXi hosts, one SAN and tape BU will be a good start. So, I know that a lot of this is opinion, but give me some thoughts on your idea of minimum hardware for private cloud offerings for say a couple of mail servers for small offices (<20 users) and maybe a file server or two.
PS: Let's assume my power, redundant internet pipes and etc is all good, because it is.