It is a lot of effort... Eggs are a super food. Much easier to keep chickens or ducks. The birds can essentially eat garbage or things we don't want to eat (seeds, bugs, etc), and you get a steady supply of complete meals out their butts.
I have pondered the idea of making a complete system where I use the "duck water" as fertilizer for aquaponic food for both me and them, and to grow lots of algae for tilapia. Just letting the birds do what they do naturally is pretty easy, tho.
Don't know much about raising tilapia. If I had more room I'd do chickens. 6 guys in our group raise them. I live in mid Texas between a pond and a golf course. Tons of ducks, geese & nasty f'in turtles.
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