We had six hens in a 4 x 4 tractor coop, 4' off the ground and it worked okay. We intended to have only 4 hens but you know, the darn chicks were so cute. DH used mostly left over supplies including a rubber mat on the floor over mesh wire (in the winter). That rubber was left over from a porch roof and it helped a lot. The coop traveled around a large yard in nice weather but we parked it on the south side of the garage in the winter and the ladies came through three winters very nicely. We covered the chicken wire around the bottom of the coop with plastic and used straw over the rubber floor in the winter. They were out of the wind and I fed them vitamins, sometimes apple cider vinegar in their water, buttermilk soaked bread, bean sprouts, etc. They were very healthy in our cold winters. Straw bales around the bottom of the coop would work too--lots of good ideas out there. Keeping chickens is so much fun and those eggs are wonderful to cook with. Also, sharing with family and friends is great because country eggs are something most don't have and many kids never see. Enjoy!