yes thats pretty much it
so i think in general money was unbalanced on the maintenance part of the system
even though mid end game there are so many expensive things to buy and champions to hire
basically this game is so much different from every other management game because you need to keep a balance even for the first part of the game (like every other civ or so ) but you need to increase greatly the income as the game progress (while in civ and similar you usually just want a net balance, maybe you raise research happyness and other stuff but you dont want to start accumulating money, usually)
this is slightly harder to balance
