OK so we had nesting boxes, but took them down because we didn't like them. But we had this old little wagon that has the dimensions of 34.0 x 18.0 x 15.5. So I want to take the wheels and pully thing off then make the boxes in it. Do you think that would fit 3 boxes? I have a Deleware, Blue Andalusian, and Black Langshan if that helps. Thanks!