Only ones that can not be exported like home building. I would also advise they learn at least three trades while they study management and that they be taught to save 25% of their income so that around thirty or so they can start their own small company. The smarter ones should continue their advancement and garner other companies to themselves and learn investment.
Or ... go into real estate. Accounting is profitable but anybody in business should study accounting. Generally though the trades are a dead end. They can be a good place for the young to learn about life but the attitude should always be upwards and onwards. Never get stuck in one place. Hedge your investments. It's like investing. Never put ones eggs all in one basket.
Are you sane ?