From the time an egg is incubated it will incubate for about 18'days. On day 15 you lock them down and add more humidity.
Baby quail are animals that look for places to die and I can expect about a 70% hatch rate and then about an 10% mortality rate.
After they hatch they will reach sexual maturity around week 6. The roosters will start the crow. To sex a quail you squeeze their vent (buttshole) if poop comes out it's a girl, if poop and white foam comes out it's a boy.
The girls will start laying around week 6-7. And as long as they keep about 14 hours of light a day you get about an egg a day. My birds have a timed light.
You can do anything with a quail egg that you would do a chicken egg. I'm not an egg eater but the girls love them fried in bacon grease. You can also pickle them and I'm making 2 varieties now and I've been told my pickled pink eggs are pretty good, but since I don't eat eggs I'll never know.
Once they get about 9-10 weeks they are a good butcher weight. They ain't getting much bigger in size after that. Even though the white birds are supposed to be easier to pluck i still scald mine and the key is making the water warm enough. I'm really interested in getting a plucker because I would use it for doves as well.
So from a laid egg to plate maybe 11 weeks.
I pick and spatchcock mine and bake or smoke them. They have nice fat legs.
You will get a lot of poop and a lot of wasted feed. They are messy eaters even with the stuff to help them not be. I save all my poop for people if they want free fertilizer. I been told you mix it with mulch it works really good.
Some hens will die on you if they get egg bound but I've only had a few that happened to.
In the coops we built I have a 3qt metal pan. Once they get around laying age I put sand in their and they will dust themselves. Don't have to but it looks neat. I also put Timothy hay in the cold night to give them some insulation in my shed. The pens we built the birds walk on a slanted surface so the eggs roll down into a holding area (in theory) but they will lay in the pans as well. I bought some orileys oil trays
https://shop.advanceautoparts.com/p/flotool-galvanized-drip-tray-11430mi/9016759-p?product_channel=local&store=6447&adtype=pla&product_channel=local&store_code=6447&gclid=Cj0KCQiA2uH-BRCCARIsAEeef3l7O5N2SUmBpXPGabB6mK_LvJWvMymIFTk87qrraR6pOJ5_HT6pLtwaAjOUEALw_wcB&gclsrc=aw.dsBasically something like this. The key is to build your pens around these pull out poop trays.
You will attract rats
I made my brooder box out of a big plastic tub and use blue shop towels as a liner, also crush up your feed for the babies and look for recipes for magic water
1 gal of water
Some crushed garlic
Some honey
Some Apple cider vinegar with the mother
Hopefully this helps answer some questions, if not I'll try and answer them