Don't know what your school system is like, but have you considered checking into becoming an instructional aid in a school??? The special education classrooms generally are the hardest pressed, especially the multiple handicapped rooms. Sorry, but the "wiping butts" thing made me think of it, because those jobs usually require some of that, and some feeding. Just an idea, because they don't pay great, but they pay better than $6 and are full-time jobs.
As for the $6 an hour...you're probably making a huge difference to this old lady and her family.