I can still vividly recall the old days when I wheeled speakers in on a refrigerator dolly that weighed more than my keyboard. Back then, setup time was nearly 45 minutes, and it would have been difficult to shave any time off that.
As for pinching fingers in the Rock & Roller cart--it has never been a problem for me, but maybe it has something to do with the way I open and close the cart.
My daughter, who lost the use of her left arm from a motorcycle accident several years ago, is currently loading, unloading and setting up my gear for me. I had cataract surgery on my left eye two weeks ago, and my right eye was done yesterday. The surgery precludes me lifting or bending down for about three weeks. She's a great vocalist, has excellent timing, and can handle the gear with one hand without any difficulty.
Cheers,
Gary