I turned 18, I went to university for 4 years, I went back home to my parents and found a job. Two years later I had saved up enough to buy a house. The end.
The concept of paying 'rent' just seems to be a waste to me since you don't get anything back. I'm sure there are several reasons why rent is more convenient than a mortgage, but sooner or later, I assume everyone would rather own property as opposed to rent it.
Bear in mind, university education in the UK is government subsidised. They pay for ALL tuition fees (regardless of which uni), so you just have to sort out your own living expenses -- and even then, college campus accomodation is fucking minimal. If you want to go into higher education and start living at college campus at age 18, there is really no excuse not to if you're in the UK.
Americans have it the hardest: college fees, loans / debts, private medicare, and eventually a mortgage. By the age of 25, it wouldn't surprise me if the average American is in debt for perhaps $500k (assuming they've bought a house by then).