I am sure they are just trying to do whats best in their opinions to help you out. AND I am going to have to say "Live at home as long as you can"
I moved out at 19, and came back when I was 21 1/2. It was really expensive, and I could not pay for school. Try to think about it in the long run. Save your money back and plan,plan,plan. Moving out it great, BUT it is very hard and I would rather save up my money. Bills dont ever stay the same price. Anything can happen. Car breaks, unexpected vet bill, anything could happen.
Maybe you can find a roommate to split cost? Then you wont be alone, will have more money to keep, and someone to help clean Just a thought
GOOD LUCK!!