I've done the math on the opportunity cost of how much I would have made if I hadn't gone to university. It was about $120k over 4 years, and raised the opportunity cost to about $160k (I borrowed $60k, but some of that money was for living expenses, that would have been covered by working full time). I was earning about $16/$17 per hour at the time. It increased the jump I needed to make from $.50 per hour to $2 per hour.