Need to be able to upgrade more buildings. – Crime City HD Review

This is a fun game. There is one problem though. Currently I can upgrade a maximum of 4 buildings. For players who have/buy a decent amount of gold, we should be able to buy (with a reasonable amount of gold (maybe 2500 gold bars or so)), an upgrade that allows us to upgrade as many buildings as we want, at a given time. That would make the game so much better!
Review by Exercise beginner on Crime City HD.