+1. After four years as a messenger, you'll still be a messenger. Not much room to move up. After four years of college, you'll have a much wider range of options with a degree in hand. And if you still don't want to work, there's always grad school.
I don't plan on doing this until I am 65... I may have the opportunity to apprentice with a local builder and this is what I want to do more than anything else... build bikes.
Right this is a good job as it gives me enough flexibility to spend time with my daughters (I love the bankers hours) and it's fun... and I need fun.