I know they make personal elevators that are fairly simple. My aunte had very bad knees for most of the time I knew her and used a cane but doctors said she should be in a wheel chair. She was too stubborn for that but she couldn't do stairs so she had an elevator in her house to go from the garage to the first floor. The whole thing was in the garage level and there was acut out in the floor that would lift up when the elevator came up through there. When the elevator was down you could walk over the area. I don't know if that's any help or not but I know they are out there.

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