I was looking at a catalog that had portable sheds in it for about $300. They had one that was called a sidemate. It was attached to a side of a house and had a door. The door looks like it's lockable too. I was thinking this would be a cool little greenhouse. All you would have to do when you set it up it change the roof out with something so that the sun can shine in. Also setting up some sort of ventilation. What would you use for the top of the shed for sunlight to shine in?