When I had CX & Color Yield last year, I fed dry feed, but I had them in tractors on grass. I moved them 2X/day (or 3 toward the end) and fed them every evening as much as they could eat in half an hour; 2 large hanging feeders for 25-30 birds. They didn't grow as fast as those fed constantly but as I wasn't raising them for market, that didn't bother me.
If I were raising meaties on ff, I would figure out the dry ration needed per bird X number of beaks to feed, then ferment that. I'd distribute the feed in several pan feeders; enough so everyone can have a seat at the table at the same time. I wouldn't use a trough feeder. Metal ones will corrode with acidic ff, and besides, they would be too hard to fill/clean.
I still have some of my meaties left in the freezer. This year's eating birds have been culled roos & hens, plus the remainder of last year's meaties & parted out heritage tom turkeys. I'm just as happy with non-industrial birds culinary-wise and happier with smaller & healthier birds that I can harvest when I please. Everyone needs to do what's best for themselves & their families, though. Nothing wrong with that.