My calculation on the base game cannon, at 100% fire rate, comes out as:
Cannon: 3000, Ammo Factory (Half of output): 2500, 3 crew: 3000, Crew Quarters (Half of output): 250, Doors x2: 400, Reactor (Fraction of output): 50, Corridor x1 (Airy figure): 100
Total cost: 9300
It will be difficult to get a good specific price for drone weapons, due to "airy" considerations like how many corridors a crewed ship may have for any given component group that makes up a weapon system. It will also be difficult to accurately price in the drone advantages vs crewed ships. If the prices are too high - drones have no purpose. Too low - crewed ships have greatly reduced purpose.
Perhaps a good way to differentiate drone weapons vs crewed weapons would be to make them rather explosive on destruction? This strongly encourages the putting of a lot of armour on drones. Perhaps even around every weapon - giving them more distinctive designs and a need to add additional engines to deal with the increased ship mass. These weapons have integrated munitions production, so it makes sense both thematically and functionally. It would also raise the trade off issue of spreading out components and using more drone cores vs risking chain reaction internal explosions.
