MP3 players aren’t bad, they’re just mostly obsolete when smartphones can do the same thing and we mostly already have one.

I like to keep several GB of music on my phone from my MP3 library, and I have no streaming music accounts. I pay once for my music at most.

Sounds like you found a good niche to operate in. Make yourself some money by doing what the contractors don’t want to.

I would rather work on appliances and basic carpentry than do plumbing myself anyway. Plumbing work is my least favorite of household upkeep and repair. Because the turds and everything nasty goes through those pipes. There should be no turds in the dishwasher or sink or other appliances to worry about.