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Basic butchering equipment is just a pot of water to scald the bird and a knife for killing and butchering. For killing you can hang by the feet or restrain it in a cone or bag and cut the arteries in the neck or lop the head off. For scalding, you can use a large pot heated on the stove or a turkey fryer/kettle on a propane burner or wood fire. The water is heated to around 145 F and the bird is dunked until the primary feathers pluck without much resistance. From there you can pluck the bird by hand which takes a few minutes or use a plucking machine to speed things up. Once it is plucked it basically just knife work; remove the feet, head, and oil gland, eviscerate the bird, remove the neck if you wish. Chill the carcasses in cold running water or an ice water bath. Package as you wish. Let the meat age in the refrigerator a day or two before freezing.
It's not as complicated as it would seem. It depends upon how many gadgets you employ to speed up the work and how many birds you would want to do at a time. A few birds at a time can be done with what you have in the kitchen without too much fuss. Doing dozens and dozens of birds at a time is another matter...
If you are looking for supermarket style birds with large breasts and lots of meat, then the commercial Cornish-Rock broilers are the way to go. They will grow out in anywhere from 4 to 12 weeks depending upon the weight that you want. Best butcher weight is up to you. It depends upon whether you want something that is Cornish game hen size, a ten pound roaster, or something in between.
Some of the heavier traditional breeds can make a good meat bird too, but grow-out times are longer and you won't see the breast size that you see on a store bought bird.
Stick around and read some the links provided. Then read some more... Everything you need to know is right here and has been covered dozens of times over.