Companion Care Needed

About who needs care: My 52-year-old brother is 280 lbs and has severe hip and knee pain that limits his mobility. I am visiting from California for a week and driving him to doctors appointments on 6/2, 6/3 and 6/5. He may need help getting from the house to the car, then from the car to his appointments and back to the car again. Physically strong caregiver preferred. About the care needs: This would be a limited job, just 3 days (or half-days). An easygoing and flexible personality would be nice, since the caregiver would spend time with my brother and myself. Services needed include: mobility assistance.