You could also call the school and see if you could set up at the local sporting events. Bows in school colors would go over well. I also set up at my daughter's dance studio. Those girls LOVE bows!
As far as your husband, if I were you, I would gently remind him that you need an outlet too. Moms are moms 24 hours a day, 7 days a week. We don't get off hours. We have jobs (some outside the home), children, husbands to care for, we cook, we clean, we taxi...everyone needs to do something to destress.
If making bows makes you happy, that should matter more than anything. The cost of doing it is well worth the therapy that it brings.