Joel Salatin has a youtube video where it shows their chicken tractors for broilers. I don't think it would be hard to make a tractor or two or three that works well for them.You'll definitely need to keep the meat birds separate, they grow way too fast and will hurt the others. Meat birds get 24% starter grower, and the regular dual purpose or egg layers get 20% starter grower also. Some people have to withdraw the food from the meat birds overnight also, I did that. As for tractor, etc, consider that you'll need to enter it to catch the birds for processing, or how to access for cleaning (in case it is too heavy to move daily), and how to get the food and water in/out as part of the design. For docile birds, the amberlinks I have are very easy to catch, as are the sapphire gems, they're known for being egg laying machines. THey don't sex by color, so you won't know if you have cockerels mixed in with pullets until they crow, get hackles, etc. Only bad think for amberlink or any other ISA brown, should you change your minds on breeds, is they are supposed to get cancer at around age 2, that could be a problem for the kids. Best of luck, I'm excited for you!