Welcome to BYC. Glad you decided to join our flock. TwoCrows has given you some good advice. I would definitely keep the egg layers and the meat birds separate. For egg layers, I would recommend Black Sex Links. They are hardy and friendly, egg laying machines. I've raised them for years (along with dozens of other breeds and hybrids) and they have been my best layers, consistently churning out over 300 eggs per hen per year. For meat birds, Cornish cross is the way to go. They are ready to butcher at 8 weeks. In fact, if you wait much beyond that they begin to develop health problems due to their abnormal growth rate. Please feel free to ask any questions you may have. We are here to help in any way we can. Good luck with your flock.