[Suggestion] Charge players for building when started.

Instead of charging players gold after a building is done, I think it would be alot more convienent for players to charge them before it's started. Two reasons for this: one, it's easier on a player with large projects underway, so they don't accedently go into negative without realizing it, and two, right now it's a newb trap. I remember in my first game building a good amount of buildings and then thinking to check my reserve. 1,000 or so, I'm good. Pretty soon I was well in the negative. And if you want players to be able to spend what they haven't used so far, as it is right now, I would recomment a second number next to the current amount saying how much you would have after all construction is done. Thoughts?