When she lived at home in Half Moon Bay before her parents died, Stephanie Hill would do the family's grocery shopping by herself. She'd zip to the store in her motorized wheelchair, pick items off the shelves, and carry the bags back to the house. And when she needed to go to the doctor, she often could go alone. Hill managed all of that even though she was born with cerebral palsy and can't get herself out of bed, walk or dress herself. But when her father became ill and died of colon cancer four years ago, her independence ended....