He can expect $25 an hour. He is competing with $10 immigrant labor, not because they have an equatable skill set (he has a covered cab full of his own tools and is an ultimate DIY) but because the people hiring don't want to pay for quality. Note that the climate of construction radically varies based on locale, but in central PA it is always stuck at the bottom.
And he is capable of electrical, plumbing, roofing, framing, cabinetry, etc. All those professions are stuck at rock bottom because their target demographics are all getting consistently poorer. As the middle class dissolves, consumer grade high skilled trade labor dies. You can't all be building some rich guys back yard amusement park, and most busnesses contract with a trade firm for their construction rather than freelancers. My father has gotten a few industrial gigs, which were always consistent pay sources but also only paid barely minimum wage and usually hired immigrant or just-graduate workers who mess everything up and do shoddy jobs.
So it isn't that simple. If all the poor people got educated in a trade, they would still have no one with money to pay them, unless they got into one of the 3 or so degreed professions that are actually seeing hires (all stem, plus law, and maybe business administration from an Ivy League). And if they were to self teach through online tutorials or other library resources, nobody would look at them for a lack of credentials even if they site their own personal projects ,because they are not "professional" jobs.
So unless you mass migrate these poor people to where money is (and for lack of anything else there is plenty of money even if it is locked up in economic loops outside the ones those in poverty occupy) they could have all the skills in but you would have to effectively hit the reset button on their economic engine when none of them could buy or rent land anywhere to farm or mine.