My FC members will be completely unsubscribed for a few months while we play other games. We had tried for an FC house, but with the house lottery issues, we decided to take time off. We are worried that our FC will disappear though if none of us are online for an extended period of time. While we did remove all of the gil, we do have stuff that will be sitting in the FC bank. Nothing that cannot be replaced.
Main query was from the group entire. Will the FC survive our time away from the game?
Owning a house is the only thing in the game that has a self destruct timer due to inactivity as far as I'm aware.
I think it will still be there; it's not like housing where a person has to log in to keep it - it will just remain as inactive FC with members who haven't logged in for some time, but I believe everything should still remain there for when you return. I'd only worry if you had housing, but that doesn't seem to be the case.
After 35? days your FC master role will be passed to anyone still playing within the past week.
If everyone stops playing at the same time, it would probably just get passed to whoever logs in first when you start playing again.