vertical farms usually use shelves like in a warehouse for the plants to grow in that leaves a lot of room in the hallway between the shelves for workers and equipment to move in but it reduces the amount of area for plants to grow in better would be an entire floor full with plants that's only 1 or 2 meters high with lamps in the roof and machines hanging from the roof that could move on rails that adds soil, plant seeds, adds fertilizers, water plants and harvest plants or if it's an aquaponic system, then makes appropriate adjustments the machines would be able to move between floors by using rails between floors which would reduce the amount of machines needed and thereby reduce costs a warehouse could be used with a construction inside that's built with as many floors as possible the plants would preferably be short food crops such as: potatoes, peanuts and beans ...