I moved out at 17... in 1996/97 (joined the military)
My closest sister stayed home for 3 years of community college (working part time - school sometimes full time, sometimes part time), then transferred to a 4 year school and lived in the dorms. My parents paid
My closest brother was given the option (as was my sister) to either do community college for 2, then dorms and university for 2 OR stay at home for all 4 years of school, and get a car (since dorms for 2 years cost $15,000-$20,000... it was dorms or car). He chose the car.
My other siblings split in various ways; 2 at home 2 in dorms, or 4 at home and car
((My dad was still military when I graduated HS at 17, there was NO money for school/dorms/cars when I came of age. No hard feelings, it was just what "was".))
One of my sisters has moved back home with my parents twice (after graduation for 1.5 years... until I found her an apt, and walked her through the how to find a job - she's not an independent type.... and now she's back again for 2 more years and counting. She's really not very independent.))
My baby brother just graduated from college last year (another one who did the stay at home + car option). He got an apartment 3 paychecks into his new job. He stayed local for a year, and is now working in the EU.
My parents never charged us anything for rent, and we're all allowed to come home as needed / desired BUT rules are really clear. After highschool you can go to college and stay home, go to college and live in the dorms, or stay home for a couple paychecks (and get a cosign on one lease). I've been the only one to sign up. That's not really an option my parents present. In fact, they're dead set against it (although my dad had over 35 years in), and I had to pull some serious manipulation to get them to sign on the line letting me go in a year before I was 18.
For those living at home; there is only one rule : Common Courtesy. You can come and go as you please, when you please, as long as you aren't waking people. Only those who say by 3pm that they will be home for dinner get fed (my mum shops at 3pm), anyone else is on their own. You clean up your own messes. You help out when asked.
For our family, clear expectations work. I'm the only one who ever bucked the system, and I did it by moving.
PART of what helped the system is that my parents moved when they were down to two kids. It's still "home" but it's not HOME / proprietary. My room is looooooong gone. When I came home to visit, I didn't get my old room... only 2 of my sibs "have" a room there. My glomming sister, bless her heart, won't stay in the guest room, but apropriated my baby brother's room... and it will take grad school to pry her out of it. She doesn't do change very well. She's run out of gas because "her" gas station was 5 miles away, and she didn't want to stop at the trillion other stations between running on fumes and running out. She's that type. She needs her hand held. The rest of us... we're out and about.