Well for a VPS, KVM over IP is as simple as running some piece of free software, as opposed to having the same thing on a real server where you need expensive equipment. This explains the cost. And as I said, the console is indeed expensive if you want it permanently, but is free for 2 hours and we seldomly needed it more.

Now if you are set with the computing power provided by a 20$ VPS that's another thing, I'm just saying, if you need more you should consider a dedicated server or maybe collocation.