Agreed.
I'd hate to put that much on the shoulders of someone, as it invariably ends up being a longer than expected and painful experience, especially as a volunteer.
I do the same thing on headphones as a free thing for people and it always takes me longer than I think, costs me more than I imagine in materials and consumables and the pressure of juggling work, wife, rest time and trying to get all these headphones made can be stressful.