Heyho,
in a post NQ-Nyzaltar wrote that they have 3 ideas for safezones on other planets. Here i want to share my idea.
In our Universe are thousand of Arkships but they all crashed.
Now when people start exploring they can find crashed (ruins of) arkships, my idea is that the community can repair those ships to create safezones like on the first planet. But to repair them you will need many resources. Maybe you can design it like a Event.
But another variant is that a organization can "capture" this Arkship/safezone if they have enough resources. But you will need guys who use the material to repair the ship. While they repair it the other guys have to protect the workers and the arkship. If the enemy deals enough damage (Arkship Repair reached -1%) the repair failed and it cant be repaired in the next 30mins. after 30mins another organization can try it or the same can try it again.