Maybe look into using antenna mast as the connecting beam structure.
the triangle structure is light, dimensionally stable, easy to connect to, and you can buy premanufactured.(or used!)
Doesn’t collapse under compression, and may hold up to hogging too.
We keep coming back to this design in our asteroid mining group.
Bump for awesomeness. Such well-thought out projects using interesting opportunitues and having a business potential are exactly what we need to get seasteading started. I see it has been a few months already, and would love to know how it’s coming up