We are new and are going to build our first hen house. We are starting with 20 chicks. We were thinking a 2 unit device. One: the hen house for nights and bad weather, where they could stay inside and be protected. This would be more permanent. then - Two: a tractor yard, we could move it with the polaris. with one end covered to keep out the elements. How many laying spaces do you need for 20 hens? How big does each space need to be for big chickens, like Rhode Island Reds. Would stacking plastic storage containers inverted work, cut some holes for ventilation, easy to clean, etc. ??? 12 x 12 x 12 ??? or 15x15x15 or bigger?? How wide are the perches, 2x2 or smaller? Let me say, Thank you. We are still researching but time is drawing near for some decisions.