i asked my veteran's administration therapist for any digital speech processing (DSP) software and she presented a catalog the size of the new york city phone directory.
she may already associated with organizations for the blind that help the blind for free.
give a quick phone call to 'diabled american veterans' which is separate from the va. she likely don't qualify for a grant but they can steer her/you in the right direction.
i did usability studies for microsoft and i know that they develop software for most physical disabilities. however, its best to work with the federally funded blind organizations which are dedicated to the purpose. they may have a program that will provide both hardware and software for free. also check with your county and state handicap agencies. btw, she is eligible for free mail on anything like music, braille literature, books on tape, recordings, etc. ask your local postmaster.

i was going to recommend rock star not cuz he helped me on dsp issues.