School budgets are pretty slim. They come out of our tax dollars and I think we all feel the same way about taxes. In one of our local public schools they have a bunch of inexpensive guitars for their music program. They are bought used, or donated, so most are in pretty rough shape. Particularly after a few years of being banged on by a bunch of kids.
Here I am shimming a nut on one of them. An Oscar Schmitt that is buzzing from the nut being too low. I do not charge anything for my time, and I try to keep parts cost to zero also. Just make them play so a kid can experience the instrument that I love. I am not much of a player myself, but I do think that having both hemispheres of the brain engaged during school hours is important, so this is my small way of paying it forward.
-- my blog: http://watertoneworkshop.blogspot.ca/ my You Tube channel: https://www.youtube.com/channel/UCA5AretE3xPoVDV61AxUdUA?view_as=subscriber