Pre-canon, Buck makes money via sex work, living out of his jeep and cheap motel rooms, scraping by with selling himself when he can't find enough work. Maybe continuing into his probie year? LA is expensive and the probationary pay isn't great.

Maybe something about the 118 finding out, Bobby feeling bad for judging and helping? Athena finding him and realising, returning him to Bobby instead of booking him? Or just out of the closet Tommy hiring him and realising he's the 118 probie and pivoting to helping him instead?

Does angsty hurt/comfort fit into a kinkmeme? lol, here's hoping!