Probably resurrecting an dead topic, but I managed to transform the second floor in a full settlement with one exception: I'm not able to make any companion go there. I followed the tutorial in question (https://www.nexusmods.com/fallout4/mods/38008) and I just can't make the quest run on start to make it available to send the companions. Despise that, I can build everything I want inside. Unfortunatly, my The Sims-Blade Runner dreams of living there with Curie cannot be fullfiled for now, but it was the first time I used the Creation Kit so I'm quite proud of no crashing my game completely haha. If by any means I fix the problem listed above I'll post the mod on Nexus.