Once again CelticOaksFarms hits it. The smells will be very minimal if you keep up with cleaning. Baby ducks are messier in my opinion because you have to keep them in the brooder instead of outside, but they sure are cute! I dunno about Pekins being any messier than Runners, I had a Pekin when I first got chicks back in March. I'm probably not the greatest person to ask, I've only ever had 1 or 2 ducks at the most so that is pretty manageable but I also have 5 hens. I don't know anything about butchering because I only keep ducks for eggs so idk which are the best for meat, but I hear most people use Pekins for that.