Do they really? Are there any numbers available to support this? Sample size of one, but my brother is in that field, and it's been their and their subcontractors' slowest year in a long while.
Maybe tell him to get a sticker for the back of his truck and make sure he has a Google map listing with 2 photos of his work and a very basic website?
Demand varies a lot by location, type of contracting, price, etc.