Apparently ducks are very hardy and require little care. Also, they are foragers - little feed required, natural pest control, do not tear up ground, eat a more diverse assortment of food. Can survive in colder weather & warmer weather.
Grow your own chicken feed: The best producers appear to be mulberry and wheat (when grown with the Fukuoka-Bonfils winter wheat method). Sepp Holzer pushes a perennial rye and sunchokes as the core chicken/pig feeds.
Building a Chicken Coop - A great guide to raising backyard chickens in a holistic manner from a chicken tractor to alternating coop runs. Building a chicken coop does not have to be tricky nor does it have to set you back a ton of scratch.
Backyard Chicken Costs (Infographic) The actual costs & profits of raising urban backyard chickens will surprise you! The price of chicken feed and bedding is nowhere near what you can get from the eggs, manure and compost material!