I have a friend in her fifties who must sleep in a lung. Her's was modified by her father and uncle so that she can push a switch and roll the cot in and out, and another switch to spread the foam collar open or release it so that she can get in and out by herself.
It is a fairly simple construction and wirining project for someone in the mechanical trades. I'm in the process of modifying the "collar buster" device to operate the spiral type collar since the foam ones are no longer available.