Live-in Home Care Needed For My Father

About who needs care: My dad has a heart condition but is under control with medication. Though he was hospitalized last February for inactivity and a problem thyroid problem, which was solved withs surgery. His wife and my mom passed away 4 months ago. My brothers and I as well as our cousins have all traveled and spent time with him the past 4 months. His memory seems to be diminishing. He has physical therapy at home a couple days a week. In short, when there is someone there with him at the house, he does pretty good. When he's alone, things go poorly. Services needed include: transportation, meal preparation, errands / shopping, light housekeeping, feeding, bathing / dressing, and mobility assistance.