I've been raising them for some years now. Maybe I can answer some questions.
They need about 1 square foot per bird to be happy, but will be okay with a little less for a bit if needed. If you are caging them, keep the ceiling low so they can't get enough velocity to break their necks when they get startled and try to fly or "pop-up." If you are putting them on ground, either stick with the low ceiling for a tractor or use an aviary you can stand in that they can't fly high enough to hit the ceiling. My tractor is 8 inches high. My aviary is 8 feet tall.
It only takes 18 days to incubate them. It is important to keep the incubator temp between 95.5 and 99.5. I like to keep it about 98-ish. Leave the hatchlings in the incubator until they are dry, up to 24 hours. They are still digesting the last of their yolk, so it's okay.
Hatchlings are very tender. They need 99.5 temp for the first week, warmed and filtered water for drinking, and unmedicated feed that has been run through the blender to powder it as their little beaks are too small for even crumble. I use the cloth-like paper towels at that age instead of shavings so they have enough friction to stand up without spraddling.
Once they reach adolescence, the roos' chests will turn orange. The hens will stay speckled. You need about 1 roo for every 5 hens.
You can butcher out the excess males. All you need is scissors, a pot of hot water, a source of running water for cleaning the carcass, and a probe style thermometer. Keep the water at about 160f. First use scissors to cut off head. Then hold it by the feet until twitching and squirting stops - plus about another minute-ish, trust me on this. Then dunk the body into the hot water and swirl it around a bit for about 30 seconds to scald off the feathers. If the water is too hot, the skin will tear. If that happens, oh well, peel it off and continue. Now, pluck the feathers (I hate this part. I let hubby do it.) Then, use your scissors to nip a hole in the skin just to the side of the vent and carefully insert the scissors along the spine. Cut through the ribs just next to thespine and open up the ribcage. Don't worry about the breaking ribs - the bird can't feel it. Pull the guts out all the way up to the throat. Trim around the tail and vent to remove both. Wash under cold running water and chill the carcass. You're done with that one. Now for the rest of them.
I use a mixed flock crumble for my adults without a problem. I provide a litter pan of sand for them to bathe in and a shelter to lay eggs in. I keep the feeder and waterer about as high as their back when they are standing. I love to bag my mowing (electric mower) and dump the trimmings. Watching them play in the grass is so fun.