Read this article (linked) about the rising popularity of in home elevators. This is a very exciting concept, and very useful for people with limited mobility. The article lists and explains the top types of in home elevators:
“In very broad terms, there are three main types of elevators. The first is hydraulic. It takes up quite a bit of space in your home and requires a machine room for the equipment that runs the elevator. If your home is a new construction, then it is a little easier to plan the space needed for that type of elevator.
The second type of elevator is referred to as atraction elevator or MRL (machine room–less) elevator, and as the name implies, it does not need a separate machine room. It works by sliding up and down a track with a counterweight. If you are retrofitting, then this type is a better bet. It still needs additional space above the top of the elevator to house the equipment that runs it.
The pneumatic elevator is the third type and the most recent innovation. This giant polycarbonate tube with a separate tube inside for the cab works with air pressure, pretty much like those deposit tubes at the bank drive-through (although, thank goodness, you don’t whiz through quite that fast). The 37-inch-diameter tube can be installed without any need to build a shaft or a machine room, so if you need an elevator in an existing home, this may be the one for you. It needs no machine room, as the pump box that runs the elevator is only 11 inches tall and the same diameter as the tube.”
Also, the cost–though totally worth it–ranges from $15,000 to $25,000 for installation.