Realistic Large Scale Space Construction
Interesting web page with large scale space structures and current technology readiness level (TRL) estimates:
To date, the largest structure built in space is the International Space Station (ISS). ISS took over a decade to build and required over a decade to assemble.
The follow-on space stations that are expected to be built in the coming decade are all smaller but are expected to be commercial outposts.
But the really big space stations that could have there own spin gravity remain on the far horizon. Two examples are the Stanford Torus Space Settlement, and the O’Neill Cylinder.
Space Cities Out of Asteroids and Graphene Bags? Intriguing O’Neill Cylinder Study