I more meant "I had 200m in the bank and accidentally spent 170m of it to start constructing a police HQ".
If you bulldoze a building when it's only 2% of the way through being constructed, you should probably be able to get 98% of the resources spent back - whether housing demand, money, whatever you spent.
Possibly 100% back until you hit 5%, just to allow for those mis-clicks.
