One of the biggest problems for concert harpists has always been whether to tour with their own harp or rely on harps on location. If we had a network of reliable concert-quality instruments in all major cities, it would greatly facilitate harpistry. It seems that it is up to individuals to be willing to provide them in most cases. Do you have such a harp and are you willing to rent or loan it to a performer for a concert? By concert quality, I mean a harp that is in good condition, reliable, good sound, not hard to play, and in good regulation, with good strings. Some will prefer different makes, so we will probably need more than one harp in each area. Depending on the engagement, you could earn upwards from $100 for use of your instrument. Harpists earn fees from as low as nothing to as much as a few thousand, depending on the presenter.
I have done so in the past and found it to be rewarding, both personally and artistically. My harp was even used on a recording by Heidi Lehwalder with the Tokyo String Quartet.