good for you. Other good things to cut costs even further are to do domestic changes as well things like collecting rainwater, growing your own food , using wind and solar power ect. you can even do it in an urban setting if you know how , be it through simple bottle based window gardens or making a community rooftop garden ect.

Also it is scientifically proven that musical education improves life quality and in many cases fosters further interest into further education. So basically you are opening worlds for these kids who will have wider horizons that will impact how they operate and perceive their world and they will pass that on to their kids. It is slow change but seeds like that are never for nought one way or another ...