so if the tower is a good way of growing it, I'd definitely do something like this on my property.
I'm watching this thread out of interest, but I've had no luck with any form of raised/tower garden structure given my climate and the nature of my soil.
I CANNOT keep them growing when it's hot and dry -- even watering morning and night.
But in less heat or with more rain it out to work (I let squash and potatoes grow in my cold compost piles in New England).