I am aware the guild-hall is our "housing-system", however unless it was my own guild - I can't get myslef to get invested into spending time and resources, just to see it eventually fall apart or to be kicked because of unavoidable inactivity.
If we could simply "bring our rooms with us" that might change for me.
The "private rooms" would be only accesible if you are member of a guild and that guild was not in default.
They would be accesed from within the guildhall, similar to the entering the private training hall. Let's call that section "living quarters".