We sure did get lucky with our property! We have a 2 acre shared pond. A few home built on the pond have property that goes over the pond, and only we few houses get to fish it. We I decided to get ducks and I tried housing them on their own, I tried with the chickens but in the end the 3 of them went their own way and free range living on the pond 24/7. It gets messing around the pond but no so bad because they have so much space. They air-rate my lawn beautifully! I've noticed the weeds are down, and the grass comes back greener each season because of them!
I have to keep them out out out of my garden!!! They were not only tearing up and eating all my strawberry plants, but they were nesting in some of the beds crushing plants. So lots of little fences to keep them out.
We have a Muscovy and 2 Pekins, and their personality is amazing. Once you catch the female Pekin, she'll get comfy in your lap and eat out of your hand without a complaint. But her man will yell at you to let her go!
3 is my limit though.... because they free range like they do, we have what seems like an EASTER EGG hunt every week trying to find where they've been laying to enjoy the eggs.
Brats!
Anyways, if you get enough of an enjoyment out of them, and you have the patience and time to clean up after them... they're worth it!