[tacon]

The lessons are an ongoing expense, but the principals will rather quickly eliminate the middle man marketplace after meeting and being happy with the connection.

[patmorgan23]

Unless you can provide other useful services to help the teacher to manage thier students. Maybe scheduling, accounting, payments.

[jacobedawson]

^ Exactly - this where 'commoditizing your complement' comes into play: https://www.gwern.net/Complement

[kristianc]

In that case it seems a lot easier to skip building a marketplace and just create booking software for music teachers.

Though you'd probably find that most were happy with Google Calendar, Xero and PayPal / Square.