Raising the babies can be a pain(they get sick easy apparently). The subadult and adult birds seem pretty hardy and they aren't very expensive lately. I had a emu for a short while, and he was pretty placid. If you raise it around dogs, don't expect it to defend itself against feral dogs or coyotes. Raise it seperate, and it'll be a great guard though.
I'm in the "you're nuts" catagory too. But hey, you can always have the BIGGEST turkey ever for thanksgiving next year.