What is the difference in Hoyer lifts and a sit to stand lift. I called Handi-Medical and they told me they do different things and are not interchangeable. I don't want to have to live with BOTH of these in my home! My main concern is getting mom out of bed to her wheelchair/toilet. And if she falls, I need something to pick her up and put her back into her chair. We are moving her from an independent building into my home so there won't be anyone to call on for help. Are they just trying to sell me both? I don't understand why one can't do both jobs??? Also, does Medicare help pay for this?