Advice on Best automatic cat box

This is a different kind of request, im not asking anyone to buy me anything.

Im looking for advice and suggestions from anyone who may own an automatic litterbox.

If anyone remembers a few weeks ago I posted how my mom had a bad accident temporarily paralyzing her .

She is heading home soon but I'm worried about her and cleaning her cat box. And I really don't wanna get rid of her 2 cats they are her companions

Anyways just looking for any input especially when it comes to size for bigger cat