From: My Own Private Hell
Unfortunately, though, increasing (I want to increase, not decrease) the base price of a component will make both the price and the maintenance go up. The price more than the maintenance, I'm sure.
Basically, all I want to do is significantly increase the maintenance cost of certain components (research labs, manufacturing plants, mining stations).
Just increase the base prices then, note the original / vanilla value and increase it by 10, see what you end up with, that way you will have a rough idea of how to scale the increases so that you can find a happy medium that will do close to what you want without needing an overdraft to build the next object.