hi I have made a coop about 3-4 ft. tall and 4 ft tall for 1 roo and 1 pullet. It is simple. 4 sides, 4 roosts, 1 enterance, with a screen flap, with a huge coop and water and food. its simple. no windows, not lights. is this gonna be ok for the cali. winter? usually get as low as 30 deg. and frost.