That's the point--you can ferment dang near anything. It's how you keep fresh vegetables when you don't have a fridge. I would hit up the library for a book on fermenting, it's kind of an un-learning experience.
But really, $150 for a person who is living exclusively on Food Stamps is suspect. Maybe get a good looking person with tons of patience and good people skills to accompany her to the HHSC office next time.