My parents, got me to "leave" the family estate at 21 years old, but they did it by gifting me a 2-bed apartment, all paid off as my 21st birthday present. They didn't really need to kick me out, I just went there of my own volition.
I still go to the family estate for meals, occasionally -- but being independent at 21 years old really allowed me to grow, and experience being an adult. It allowed me to balance my stipend from the Trust Fund with my outgoings. Sure, sometimes that $4000 a month (at the time) wasn't used correctly, and I had to go cap in hand back to my parents to help with finance for the month, but I learned from it and have become a better adult because of it.
I fear if I'd stated at the Family estate too much over 21 years old, I would not have grown as I have and instead withered.