Hi Lafadra, it's nice to have you here with us. To help keep the cost of building anything down, keep your eyes open for materials you can re-purpose like pallets or free items on CraigsList (or your local newspaper).
Hello! Welcome to BYC! Will they be confined to the run , or will they free range during the day? 10 square feet for the run of chickens who are confined, and coop space should be 4 square feet per chicken.