A thought I had was to have a multiplier be used to adjust the cost of whatever the action is. As temperatures rise, so does the multiplier, which increases the cost. Otherwise, you end up with thousands of dollars and the largest expenese is a couple hundred dollars. What this would end up doing is make it so that the current player may or may not have a choice (just like at the beginning of the game) on how to play the action.
Perhaps this is just the gamer in me coming out.