You have to make sure you use the right tools. If you re-invent the wheel a dozen times, managing cloud deployments will be a nightmare. Tools such as Rightscale or Scalr.net are well with the money.

I manage 2 dozen Ec2 instances of various types as a side task to my regular development job. I script everything. When things are scripted they are consistently reproducible and fast. Humans make mistakes (including me).

I would prefer there to be a dedicated SysAdmin but there just wouldn't be a full time job for him to fill.