User blog comment:Willbachbakal/Singleplayer Enemies: Security Bot/@comment-2179185-20100829194304/@comment-1330314-20100829195342

You don't really have to worry about the cost of upgrading your bots, because they'll stay with you throughout the whole game, not just a single level. If you hack a Bot, you'll be best friends forever until it gets destroyed (or until you recycle it).