This is a bit of an extension to the idea of DSC Bay lowering water recoveries. What if there are contracts that lower the prices of launch locations for a limited time? For example, you can get a deal of getting cheaper prices for certain launch locations if you complete certain contracts. Things can also get more expensive for certain reasons, this is to spice things up! You can also get certain discounts for certain missions for a limited period, etc.
Right now, career is not very complicated and hard, but if the game ever goes super into the career aspect, then this could be an inspiration for a feature.