As soon as my twenty yr old got a job outside of fly-by-night restaurant jobs she found a room-to-rent and was out. It took awhile for the real job to happen...
I was normal 75 years ago for Italians and others to live 2 or even 3 generations in a huge house or next door to each other.
I think it was great.
But they were all working and helping out at home. When they got married they moved sometimes.
I’d be afraid for a 20 year old girl moving into a room to runt. Independence and dangerous are two different things.
As did ours.