Maybe things have changed a lot in the last 35 years, but when I graduated from HS I would have loved to move out of my parents home, but that was not a choice I had. It also had absolutely nothing to do with finances either. As a "female" I was required to stay home and pioneer until I married a spiritual man that my parents approved of. Most of my JW girlfriends were in the exact same boat.....And for some crazy reason we just blindly obeyed (cause that's what you do)
It could be that the 3 woman mentioned in the original OP are not allowed to leave home until they find a spiritual husband.