Folks have done a nice job discussing layers here, so I'll focus on your meat birds. An 8X8X2 tractor can house 40 meat birds and if you're successful that will be about 240 pounds of meat. A 4' feed trough and a bell waterer along with a solar energizer and some hot wires around the base of your tractor will help ensure you get to eat your birds. If you want more on tractor design I'd be happy to share, as my design has evolved as the predators have taught me where the weak spots were.
With an 8x8 tractor, you'll need to move it 35-40 times (every day and twice a day near the end) assuming you brood the birds for 3 weeks. Those 35-40 squares won't be usable for meat birds again for about 3 months. So plan out your grass. The better forage (grass and legumes) you have the better your conversion rate will be. Best I've done so far is about 3.5:1 That's 3.5 pounds of feed for every pound of finished meat. I raise my cx on an 18% protein feed from start to finish. Those with really well developed pastures are getting a 2:1 conversion rate.
Processing birds is a lot of work and then you need to be able to chill and rest them for 24-48 hours before freezing. I have professional processing equipment and our team of four can do up to about 300 in an 8 hour day, but I'll be sore for a weak after. I prefer to do 40 or so at a time, easier on my body and easier to store for resting. If you want to do cut ups, it takes practice, but I can part a bird in about 3 minutes (assuming I'm well rested after processing). Gizzards are a PITA to clean and have to be well chilled before attempting.
After vacuum packing my cut up birds, we take the feet, carcass and necks and make stock, which get's canned and stored in the pantry. My 160 qt stock pot can handle about 34-35 carcasses and pairs of feet and will give me about 90 quarts of stock, as well as some nice chicken fat (usually a quart or two). I run two pressure canners which hold 14 quarts each. Why so big, well it takes the same amount of work to make 6 quarts of stock and I don't have to store the carcass, necks and feet in the freezer.