I'm planning to build a new coop for my broiler chickens, and I want to ensure it's both efficient, cost-effective, and provides optimal conditions for the birds' health and growth. I need guidance on all aspects of coop design and construction, including the ideal size and layout for a given number of birds, appropriate ventilation systems to maintain optimal temperature and humidity, effective lighting strategies to support growth and well-being, and efficient waste management systems to maintain cleanliness and hygiene. What materials are best suited for construction, and what are some cost-saving strategies I can employ without compromising the birds' welfare or biosecurity? I'm also interested in learning about strategies to minimize the risk of disease transmission and pest infestations.