Another thing you may want to consider is getting a CNA to visit here. A typical CNA is about 22-25 an hour from a certified agency. There is usually a 4 hour minimum and a CNA can prepare meals, light housekeeping, run errands, etc. They cannot administer medicine (say insulin for instance) nor can they populate a pillbox perhaps. They can remind your mom to take here medication.
Anyways you can also go to craigslist and advertise for a caregiver/companion. You will get a better price but they will not be a certified.
So perhaps you can have the CNA visit her a little bit each week. Or look into a companion.