A growing construction industry faces a challenge to recruit skilled tradesmen. An article called "10 ways construction companies can outsmart the labor shortage" includes this advice to contractors:

Co-op with manufacturers. Work with manufacturers to bundle installation with sales so their well-trained crews put in windows and install other products for you. The more they do for you, the fewer hard-to-find trades you’ll need to hire.

Of course, manufacturers will have to recruit staff, but presumably they draw upon a different segment of the population and can invest in training for their own crew.

10 ways construction companies can outsmart the labor shortage By Sharon O'Malley | February 26, 2015 www.constructiondive.com/news/10-ways-construction-companies-can-outsmart-the-labor-shortage/368659/