There are some buildings that do not produce any income but are valuable and improve the quality of life for players. For example:
This building comes with the governor package upgrade, providing protection for players visiting or operating in the adventurer base, located in the governed zone.
This building has been designed as an in-game version of permanent housing. A bungalow is a building where one can rest and store goods safely or perhaps a safe space where friends can meet and interact. In addition, Bungalows will exist within adventurer bases, but some could be purchased as blueprints and placed on the land.