Such a good question! Hope someone out there has a good answer. I certainly could have used something like that when my mother was alive. We have 4 steps up from garage into house, so was very hard to carry her inside, get settled and go back for chair.

I've a video of a 3-4 story interior lift, hand operated, counter balanced, from the UK. The inspector overlooked it, probably thinking it was a freight elevator or oversized silent butler and not for human conveyance. It is simple, has a gate, easily controlled and braked. Was done by an architect for his home. This one requires an overhead fixed hoist. Others could be chain hoisted and I'm looking into this with the help of an ingenious Dutch engineer, an Ohio contractor, and my local car mechanic. The Dutchman thinks the chain hoist would be too slow.