Reliable and honest person with very good credentials

My mom is 91 yrs of age and I live 300 miles away from her which is 600 mile round trip for me. She shouldn't b left alone all day and doesn't want to b by herself either. She can do a few little things by her self but need someone there just in case as she has fallen down four different times and we want her to b safe. She does not drive and has mild dementia.