Just FYI modders, version 1.37 will support a new ship bonus:
COSTBOOST,0.20
(for 20% cost boost)
This allows you to make a ship more or less expensive, including every module added to it. I’ll be using it for a future race, but if you wanted a new super-experimental mega-ship with double the normal power output, you could set this to a positive value to make that ship expensive to buy.