I knew someone who fronted a one-hit-wonder band from the mid-00s; I’ve always respected their total refusal to go down the cling-to-fame route despite only being 19 or so at the peak of their ‘fame’.
They were offered Celebrity Big Brother a couple of years after the song charted, after their second album sank without trace but turned it down, went to uni and now has a pretty satisfying career doing something completely non-music-related.
My 2nd cousin on the other hand had a brief flirtation with fame in the early 80s (he co-wrote a Fleetwood Mac single), dived headfirst into the LA music scene and as a result is constantly reliving his glory days. Come to think of it, he’s probably a candidate for the OP question. Pretty sure once that song made it onto Fleetwood Mac’s Greatest Hits, he stopped having to worry about money.