I'd say your numbers are about representative of what it cost us for our 5 ducks. I haven't computed it. I did before we got the ducks, and found there were many more expenses than anticipated. Long story short, I don't want to know. A dozen store bought eggs is much cheaper, but we can't stand to eat them after having fresh duck eggs. Besides, its impossible to compute the entertainment and amusement value I get from my ducks - so purely selfish. They are staying, and I don't want to know how much dozen eggs truly costs - so I can tell the spouse I just don't know. I can just hear him telling me it is not cost effective to raise our own eggs.....I love me ducks. They stay. :0)