Thanks! It actually appears it requires a lot LESS energy then I expected. According to [1] less then a tonne of TNT could accelerate 1 million tonnes to 0.1 m/s !! So it appears I was WAY off base (by at least 10^6 :-P). I swear I'm a better programmer then physicist!! :-D

1] https://www.omnicalculator.com/physics/kinetic-energy