Here’s the order of the facilities you should upgrade in order.
- Workbench (Unlocks new weapon ranks)
- Infirmary (Permanently improves max health. Medicinal plants now grow and can be harvested)
- Expeditions (Unlocks Expeditions and Fast Travel to liberated outposts and discovered locations)
- Training Camp (improves Guns for Hire health and damage)
- Healing Garden (improves Medkit efficiency)
- Garage (Unlocks new vehicle ranks)
- Explosive Lab (Unlocks more throwables)
- Cartography (Unlocks the availability of intel maps for collectibles, animals, and missions for purchase)
Note: Maps are purchased using ethanol as well. However, they permanently mark their locations of interest in your world map for convenience.