There should be a way to invest in an individual business. Instead of having quality and capacity as decisions you make on the fly, these should be investment decisions.
g2,000,000 will get you a manufacturing plant, but to produce at 20 units a day you will have to invest g5,000,000, and to produce at top quality you will have to invest g1,000,000,000.
This would fix a lot of the balancing issues with the game:
a. It would increase the importance of raising capital.
b. It would force the player to choose factory location more carefully.
c. It would make buying a selling a business meaningful
d. It would keep players engaged in the game for longer.