The eco-fit yard after picture. I love that they call rain barrels water butts - Gardening Design
Dark rain barrels to be heat source in winter and water greenhouse in summer.
How to Plant a Rooftop Garden - loads of useful tips for making sure you create a productive and safe roof garden. Terrace and rooftop gardens are great for urban gardening where the space is scarce.
Vertical farms prove to be an invaluable way to feed the cities of the world
This looks relatively simple and affordable. If it wider you could plant tomatoes in the middle - they could be protected agains the southern heat. a fishing net? a volleyball net?