YES PLEASE, green bean teepees. This is amazing! What a great idea for some serious green bean growing. This would also work for strawberries, peas, grapes and possibly squash varieties. Basically, anything that can grow vertically!
Another version on rain gutter gardening. Want to grow a salad garden but have no room? Try gutters! Affix them to a fence, slope them for drainage, and voila! Of course,for this I'd need a backyard wider than a hallway.