I remember seeing a yt video on a potato stack. It's a 4 sided tower with one side having removable boards. Same idea, put dirt in the bottom plant potatoes and as they grow add dirt and boards. When the harvest comes start with the top board. Remove it, brush the dirt out with your hand and harvest as you go. User friendly.
I built three stacks using field fence. (not user friendly) I plant sweet potatoes in them but I prefer the wooden tower (which I've yet to build).