Flexi-Seal is the best ever. Making boats from screen doors. Reusable condoms. Instant gaskets. Want some of those goofy-assed rubber sock thingies with all the toes separated? Spray your fucking feet and save! Pocket fisherman. Pfft.
Those were nice....but it wasnt a choice on the list...??...even tho it is better than the food dehydrator. Few months back, I found a brand new, still in the original box(!!!)....Popiel Pocket Fisherman for 3 frikkin dollars!.....I snapped it right up. .....It worked great. I gave it to my dad.
Have you considered knife skills? Those machines pulverize onions when you try to fine dice. Consider one of these: https://www.chefknivestogo.com/ccksmstcl.html Nothing better on the planet for this task.