Welcome to my dream game.
Are you a fan of the open world explore/build style games like Minecraft or Terraria?
Have you heard of Starbound?
In a nutshell, you play a member of 6 (7 now) races who are exiled from their homeworld for various reasons. They have a ship, a mining tool, and precious little else. They travel around finding random planets, weird monsters, lost gears, and mine/build/and survive their way to a new micro civilization.
I love these kinds of games. I also love Sandboxy Space games like Traveller and Stars Without Number.
See a theme here?
Well, I've been pondering a mix of Kingmaker (Pathfinder fame) mixed with SWN using the theme of a game like Starbound. Land on a world, fight monsters and pirates, set up a colony, manage and grow it, and eventually take on those that cast you out from your homeworld.
The cool thing is SWN supports loads of random world generation. You can find space ports, civilizations in various stages in development, lost relic tech gear, etc. And it's all very easy to run since it uses the OSR base.
The only thing I'd have to crib up is a base resource management tree. Something to track how much gear and or material the group has to spend at one time. This is where the Ultimate Campaign book from Pathfinder comes in. They have a Kingdom building rule system. (And a base building option) All I need to to is translate the credits into resources of a techier setting and some of the structures need to be updated to space friendly options. Tada!
And if I wanted to get tricky I could throw in Other Dust's ruined city rules!
Mix and enjoy the space exploration and building!