Why are you worried about a PSU possibly blowing up an $80 PC? I mean you've had a long string of desktops in that price range so why worry about this one, or the $50 RX570 4GB in it?
I mean, if he's worried about the price of cheap PSUs, he'd probably be worried about that $80 PC. I'm not saying he needs some fancy PSU, just *anything* that isn't group-regulated or more than a decade old. He'll save on PSUs alone in the long run by spending more and getting PSUs that aren't already at the end of their lives.