yes...trying to brood them like chicks is going to give a wake-up call on what we've been saying messy is. LOL... really... you don't even think of it until you experience it.
I use old bath towels over wire for the first week, with a tub placed below the water. Rinse the towels out, throw in the washer, reuse after they dry. I was throwing out a bag of pine shavings a day! I cringe when ever I see a baby ducks on bedding in photos... people all excited about the babies... then I sit back and wait till week 2 and the inevitable "They're SO MESSY" post that follows the initial cute baby photo post.
I still brood in the basement, have a concrete floor down there. I sold both my brooder boxes, even the wire bottomed one. For $35 I bought a galvanized dog whelping box on CL, it's a 3x3 metal box, about 6 inches tall, with wire dog crate pieces that set up around it. I need to line that with hardware cloth, then I need to make a wood frame covered in hardware cloth to sit on the edge of the bin. There is a lip around the top to keep the puppies in, that will also support the wood frame.
Was thinking on drilling a drain hole in one corner, placing the whole thing on the sloped part of the floor, and affixing a hose that goes to the drain in the floor, so that it continually drains itself. It's the wet that causes the bulk of the odor. For cleaning, remove the ducks and wire floor, pour a bucket of water in, scrub as needed, drain it through hose. If I don't drill the drain hole, I will need to carry it around and pour it out like I had to with the totes that went below the old brooder.