Good luck with the ducks. They sure are cute as ducklings but I hope you like to clean.
Ducks are worse than chickens when it comes to mess and smell.
A coworker's girlfriend bought a duckling at a garage sale w/o thinking it thru very well. They live in town. it lives in the house but is crated most of the time b/c its messy and quacks all the time. helloooooo....
.....its a duck!
I really wish they would rehome it.
My experience with ducks is not with pets but with rare breed ducks and geese at the zoo. There were probably about 20-30 different species. All messy. They like to spill food all over, including in their water. They are stinky if in an enclosed area w/o adequate air flow. Of course those ones weren't tame so forget about when you had to handle them, you would get cracked on the head with a wing or get pinched hard with a beak.
But if you have an outdoor facility for them, i can see how they would be a fun pet to have. Just make sure the area is completely enclosed (including the top/roof) to keep out predators. They can be quite tame. A friend of mine used to keep geese and chickens. She's now down to one lone goose and hen and they will probably be her last birds kept. But I enjoy hearing her stories of Sister Goose and Little Red Hen...........
...lol.