I guess I should just post the background -
I'm looking into doing a side gig teaching guitar at a local music shop. They can give me 12 students. Tuition is $80/month per student, and the owner of the music shop wants to take 50% for providing the students and the room and materials for teaching. That brings the money down to $40/month per student minus whatever I lose through taxes.
I'm trying to figure out if whatever money I'll be bringing in is worth working six extra hours a week.