Client wants background music - need guidance, assalamu alaikum

Assalamu alaikum. I'm a student and I just started a remote video-editing gig. It's my only source of income right now, so I need some advice. We work with different clients - some want music in the background, some don't, and a few specifically ask for nasheed or other permissible vocals. I usually edit videos that don't include music, or I avoid handling the music part because I told the person who hired me that I don't deal with music. He said he'd try his best to keep me away from those tasks, but sometimes a video comes in that needs music. I just received a trailer that requires motivational background music, and I'm not sure what to do. I can't outright refuse because it's work and I need the money. What would you do in this situation? Should I ask the client to provide a nasheed or permitted instrumental alternative, look for royalty-free nasheed-style tracks, or set clear boundaries and billing for music work? Any practical tips on how to handle this while staying within Islamic guidelines would be really helpful. P.S. I actually used to work with this same person a few years ago when I was in high school - worked with him for almost two years. I stepped away because I was involved with music too much, and now he's offered me work again and said he'd try to avoid giving me music-heavy tasks.