Sector Patrol Hangar
Requires Trading, Strikecraft, Starhold


Customs Port
Planet Unique, Requires Planetary Administration
Cost to Build: 300 Minerals - Upkeep: -2 Energy
+1 Base Trade Protection, +2 Trade Value, +2 Clerks

Customs Office
Upgrades from Customs Port, Requires Planetary Capital
Cost to Build: 400 Minerals - Upkeep: -3 Energy
+2 Base Trade Protection, +4 Trade Value, +4 Clerks

Customs Center
Upgrades from Customs Office, Requires System Capital-Complex
Cost to Build: 500 Minerals - Upkeep: -4 Energy
+3 Base Trade Protection, +6 Trade Value, +6 Clerks


Sector Patrol Hangar
Requires Starhold, Trade Hub
Cost to Build: 150 Energy, 150 Alloys, 25 Rare Crystals - Upkeep: -5 Energy, -2 Alloys
+1 Trade Protection Range +5 Trade Protection for each Trade Hub present

Sector Patrol Office
Requires Starhold, Hangar Bay
Cost to Build: 150 Energy, 150 Alloys, 25 Rare Crystals - Upkeep: -5 Energy, -2 Alloys
+1 Trade Protection Range for each Trade Hub present

Note: For those using mods that add starbase modules, effects are capped at +6 Trade Hubs/Hangar Bays.

Not tested for balance. This will be overpowered compared to base game, due to reduction of patrol fleets and Hangar Bay use. I could not get varible upkeep valuations to work, so upkeep cost is set relatively high, but still lower than Hangar Bays and patrol fleets.