You don't need to launch that much mass: "Self-deployed extremely large low mass space structures" https://diyhpl.us/~bryan/papers2/space/Self-deployed%20extrem

You don't need to launch that much mass: "Self-deployed extremely large low mass space structures" https://diyhpl.us/~bryan/papers2/space/Self-deployed%20extremely%20large%20low%20mass%20space%20structures%20-%202007.pdf https://diyhpl.us/~bryan/papers2/space/Self-deployed%20extre...