My Mom (84) has Alzheimer's and I need someone to take her out of the house maybe 4hrs a day, twice a week. How much does that cost?

Trying to figure out how much it will cost -- on average -- to have someone take my mother out of the house twice a week for 4hrs a day, so that I can get the house cleaned up and "set-up" for in-home care. My mother has alzheimers and I would prefer that she remain as independent as possible. How much does a caregiver cost on average? (no insurance)