That's a pretty solid idea actually. Have robots build everything and then grow the people as the last step. This could actually be doable in this century with

That's a pretty solid idea actually. Have robots build everything and then grow the people as the last step. This could actually be doable in this century with continued incremental improvements in computing and robotics, which we're already working on. No need for propulsion breakthroughs or hypersleep. From the perspective of people on earth, it doesn't matter that much because it's such a long term project that no-one will be alive for both the launch and the landing anyway.