Sometimes reversals don’t take, and sometimes they’re too expensive and thus out of reach.
There are other penances this fellow can do. He should talk to his priest. Maybe he should serve on the family life committee. Organize, direct, and support a Couple-to-Couple League in his parish, he could lecture and speak about his own story - might convince some others not to go his route. Even following a regular fasting routine might be beneficial - I recommend he check out E5Men on the internet.
God lets us “keep the money” so-to-speak in many different sins, so it’s not like he’s alone. I’m always perturbed by the whimpy penances I’m given in confession.
There’s a lesson in humility when God lets us keep the money - ponder that for a while, since I can’t muster the eloquence to type it out.