Here's an interesting video on people enrolling into a trade school for a 10 month diesel engine training course instead of taking 4 years of college which comes with a much higher tuition. The enrollment fee is a fraction of what college costs and finding a job is faster and easier in the diesel engine mechanic trade.
Once you get your initial training at a trade school the chances of getting a job are much higher. Employers who want to hire a Mechanic for an apprenticeship like to find someone who has the basic training. Having a new kid on the block without any training means more supervision and less production.
