Welcome to BYC. Glad you decided to join our flock. My personal recommendation is to avoid buying pre-fab coops which are typically cheaply made, and too small for the advertised number of birds. If you do buy a pre-fab coop, I would go with the biggest one you can buy as over-crowding can quickly lead to aggression, fighting, biting and feather plucking, and even cannibalism. You need a minimum of 4 sq. ft. of coop floor area per bird (not counting the area taken up by the nesting boxes) and 10 sq. ft. of ground area in the run (more is better). Please feel free to ask any questions you may have. We are here to help in any way we can. Good luck in getting your coop.