Complex sentence: Holland moved to Los Angeles in hopes of a high career at an A&R major label, but when he found himself broke and living downtown, mostly around the homeless people, he decided to quit the music industry, after finished his own album.
Split into simpler sentences: Holland moved to Los Angeles in hopes of a high career at an A&R major label, but eventually left. He eventually found himself broke and living downtown, mostly around the homeless people, he decided to quit the music industry, after finished his own album.