I teach guitar lessons. They’re only £15 per hour. But the guitar will cost you £150. And the amp will cost you £100. And being in a band will cost you £10 per rehearsal for the rest of your life. Wanna tour? Bad news, bud. It’ll cost ya.

EDIT: Also, the feral cats that hung out in my yard were free, but the vet bills are about to absolutely destroy me