It's my day off and I have big plans, so I'll just leave this for now:
http://www.ericdigests.org/2003-3/value.htm
"According to the Census Bureau, over an adult's working life, high school graduates earn an average of $1.2 million; associate's degree holders earn about $1.6 million; and bachelor's degree holders earn about $2.1 million (Day and Newburger, 2002)."
But I also agree with the poster who mentioned technical schools and this report adds more food for thought in that area:
"Boesel and Fredland estimate that around 600,000 students leave 4-year colleges annually without graduating. These noncompleters earn less than college graduates because they get fewer years of education. More surprising, they tend to earn less than or the same amount as 2-year college students who have as much education. Furthermore, 2-year college students show about the same gains in tested cognitive skills for each year of attendance as 4-year college students. Students at 4-year colleges also pay more in tuition and are more likely to have student loan debts than 2-year students (Boesel and Fredland, 1999, p. viii). The authors conclude that high school graduates of modest ability or uncertain motivation-factors that increase their chances of leaving college before graduation-would be well-advised to consider attending 2-year, instead of 4-year, colleges. If they did, they would probably realize the same earnings and cognitive skill gains at lower cost and with less debt. In order to maximize the return on their time and monetary investment, students who do choose to enroll in 4-year colleges should do everything in their power to graduate. (Boesel and Fredland, 1999, p.ix)."