Suggestion - Blueprint mode

Hi

I played a game called Production Line, in this game you build a car factory. This game has a feature called Blueprint Mode, when you activated it, you built the machines without spending no money, and when you're satisfied with the result, you press the buy button and the blueprint become the actual machines.
I think we could use this tool here, since in the beginning of the game money is short, and this feature could save us precious money.