Need help for 15 minutes, once in the morning and once at night

My mother is 91 and is no longer ambulatory. She has wonderful full time caregivers, but we need help in the a.m. at about 10 and in the p.m at about 8:30 to lift her onto and off of her wheelchair into bed. Given the minimal amount of time, this is a hard job to fill, but it would be perfect for a Columbia student or anyone who lives near 114th St.