Self cleaning litter boxes that don't break the bank?

Does such a thing exist? My legs and knees are really bad and I find cleaning the litter can be physically painful and I'm left shaky and sore after :(

submitted by /u/Amazing-Animal2448
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from Pets https://www.reddit.com/r/Pets/comments/p0730z/self_cleaning_litter_boxes_that_dont_break_the/