Since you're just interested in self sustainability then why don't you just try a few of each breed that you're considering? And keep your fav. I honestly don't think these or any other ornamental/gamefowl breeds would be the best choice. Might as well just get a light breed that will forage good and lays much more than the O's/G's. as well as matures faster. I see that all you have are heavy breeds. Of course, it wouldn't hurt to get a couple of breeds just for "eye candy". At any rate, cubas aren't BAD for the self sufficient holding. I have not had any (yet) so someone else will answer all your other ?'s I'm sure.