Is it possible to not finish Trouble On The Homefront, and make your character live inside Vault 101 and come and go as you please, without finishing the quest?
I want to live inside the Vault, but I don't want to Sabotage it.
t is also possible to finish the quest and have the vault door stay open indefinitely. Enter the vault and don't talk to anyone - ignoring Officer Gomez, Amata and the Overseer isn't critical but there's no real point in talking to anyone else (except perhaps Butch, to get the optional "Sabotage Vault 101" subquest on your Pip-Boy, but it isn't necessary). Head to the reactor area and purge the water chip. This will cause the vault to evacuate. Wait about 2–3 minutes realtime and then go through the Overseer's tunnel. (If you can't avoid the Overseer here, lie to them.) Leave the vault when it says the quest is completed (when the vault door would normally close). The door will remain open forever, and the vault will be empty of people.