Really nice garden and pictures! My parents garden too in Eastern Europe (while having full time jobs as teachers) and the gardens supply about half of their food I'd say - more than half of vegetables and fruit, lots of eggs, a bit of chicken meat from time to time. The chicks get too old to lay eggs and they have to be replaced (and eaten! :).
I'd have a plot and a coop too if I had a house. It does not take much time. Start small and learn, get seedlings from local gardeners, who are usually happy to help, you wouldn't believe it.