Here is another robotic solution that helps disabled people live in a more independent fashion. The Fourier X1 Exoskeleton assists wheelchair-bound people with walking. It uses 4 motors to actuate the hips and knees. This wearable system weighs 20kg and can operate for 7 hours on full battery.
The Fourier X1 robot is expected to be cheaper than comparable exoskeletons. This video shows what it has to offer.