You can also look into adopting older ducks. Contact rescues (ASPCA), check the online ads, look at local Facebook groups (I don't do Facebook, and my daughter refuses to indulge me anymore, lol!).Haha. I love it!
Hubby about had a cow when I told him we'd probably need a minimum of 10, just as a ballpark guess.
I've been kind of eyeballing the swedish, I'm not sure if I've seen the Welsh harlequin yet. Because of the time frame I'll be bringing them in, I've noticed some hatcheries have already stopped shipping ducks so I've been looking at Metzer Farms options.