I have a 1?2 acre pond, a Koi pond and chickens so I got 4 ducklings> After a week I couldn't take the constant cleanup in the spare room (or the smell) , I had them in a large Tupperware container with straw, I even had the waterer in a pan, it really didn't help. I was cleaning it out twice a day.
To solve the problem, we used 2 Tupperware bins, (one large the other smaller) cut a hole in each and attached them with a cut off plastic bucket. One for bedding, one for the water and food ( this one is on a slope). I used a plastic shoe box for the water and put river rock in it at the FAR end of the Water Station. The bedding stays dry and the wet box is easily cleaned. I have pics of how I did it...to be loaded later. It cost $15.00 and an hour to build saving me a LOT of trouble and has kept my water babies clean, dry and happy.I still have to replace the water several times a day and clean the wet box every other day, but it's much easier.
I may never get ducklings again but you know what they say, never say never. If I do, the Duck Brooder 9000 is easily stored in the shed after a good cleaning.