You move out whenever you are ready as long as you making moves to get ready.
Plenty of nikkas and bytches move out at 18...work 2 jobs just to pay the bills and never achieve shyt with their lives...will be telling you to move out...and they'll eventually move back in with their parents when their two part time fast food jobs or whatever the fukk they do fire they ass.
Or they be working up the corporate ladder to just get paid 50K a year at 30 while a nikka just graduated from college can get that easy with the right degree.
While a real nikka will be like...
"While you at your parents house, stack your money up, get your degree because I moved out way to early and after you move out, you won't have the luxury to do any of that stuff."
shyt, a know a nikka that stayed with his parents until like 28 or some shyt and he just now moved away from home, got married to a woman that is a pharmacist, he knocked her up with two kids...