It will "work" -- after all, the city compost takes meat. It's just that they're willing to put up with pests and stink. And they monitor and manage the compost so it "cooks" properly.
I will tell you from experience that, unless you are putting it in a bin that is pest-proof, a foot or two of manure and leaves will not keep them out. I've buried kitchen compost (no meat/fat, just veg) 2-3 feet deep in horse manure only to find the next morning that a skunk dug it out. If you are composting meat and fat, I would bet that the smell of rotting meat will get through a few feet of manure and leaves.
As JoeHobbit says, an alternative is to pass the waste through another animal. In my case, we sometimes give the chickens meat scraps.
I've been tempted, like you, to put some of the "prohibited" items into my longer-term compost piles. I haven't yet because I don't want to encourage chicken-killers (e.g. skunks) to come around. Also, I'd have a constant feedstock of small amounts of meat/bones/fat to add to my compost, but I might not always have enough other material to balance the mix the way I'd want it.
Getting around to the answer, with the caveat that I'm not a meat-composter, so this is only the procedure that I would follow if I was going to try it:
- Build it bigger: 4' high, 3' diameter at a minimum.
- Don't bother with the bone meal. (I'm not sure what your purpose for it is.)
- Know that you will attract rats and/or other pests.
- If you add bones, the marrow and bits of meat attached may compost, but the bone itself will not break down in your lifetime. You'll need to sift them out of the finished compost.
- If you want to try to deter pests, bury it under 4-5' of manure. This might help, but I wouldn't bet much on it.
- The leaves will give a good carbon source; don't add too much at once or they'll mat down.
- I wouldn't add branches, they'll just slow things down. (Unless they're chipped, and then small quantities would be ok.)
- Don't add large quantities of cooking fat. (E.g. don't put the oil from your turkey fryer into the compost! Even the city doesn't want this.)
I'm not sure how you're going to manage the feedstock: putting small amounts of meat into the compost feedstock in a way that it breaks down reasonably and doesn't make a horrible smell.