What I don't like about the "Realistic Money Supply" option is that then the information of the current amount of public investor's money has to be in the middle of the screen, appearing and disappearing when you move your mouse over the buildings. I think this is annoying and is the main reason I don't play with this option enabled.
My suggestion is to move this big rectangle of information from the center top of the screen to the right, inside the "+". This way, we would have a cleaner and less loaded screen.
Regards,