Are you sure about your calculation? At $0.20/hr, in 3 months (90*24 hours), you would spend about $432. And your electricity bill alone would be $100. So you'

Are you sure about your calculation? At $0.20/hr, in 3 months (90*24 hours), you would spend about $432. And your electricity bill alone would be $100. So you'd be spending $1100 over those 3 months purchasing the card, -vs- spending $432 in the cloud.