After what happened to Louie's buddy Huey last year while they were outside, he became a house duck. He would sit anywhere there was a mirror (so he could see the "other" duck, I suppose, lol), so I just kept one leaned against the wall with a towel in front for him to sit on (and poop on) and his food & water next to it. When I'd get home from work and sit down to eat dinner and watch TV, he'd sit on his blanket on the couch with me, usually for the rest of the evening, even if I got up to do something else. At night, I'd plop him in the bathub (luckily I have two, so one was all his). So, lots of laundry, some mopping, and rinsing out the bathtub every few days...I felt it was totally worth it to have him inside with me. <3 It was super fun to watch him fly through the house too.
I did always declare that I couldn't handle two ducks' worth of poop in my house though, and these two new babies are proving me right, lol. Of course they don't sit in one place for very long like Louie would, so there's a LOT more mopping and scrubbing. Hopefully very soon I'll get moved and be able to build them a really secure aviary with a pond outside - I think they'll enjoy that a lot.