Ill try to help you out, just a warning i have never bred before but have done lots of research so ill do my best. I got a new computer so I feel like typing haha
1. Wait until they are all out then move them all into a damp tub with paper towels.
2. A couple of days after their first shed, that can take anywhere from 1 to 2 weeks.
3. Some do it right out of the egg and some wait until after their first sheds when they are separating the hatchlings, its up to you
4. Again completely up to you. I would make a plan depending on the clutch and how i want to build my collection. Maybe I want a powerhouse male to holdback or a multigene female to replace my current single gene females in the future. Try to set an amount and stick to it, i can imagine it will be very hard to get rid of anything from your first clutches.
5. No real place besides looking at current market prices on classified websites such as kingsnake, fauna, and the reptile report marketplace.
6. Depends on the snake, your goal should be to get everyone eating before being picky with what you are going to feed them. Some will take frozen rats their first feed but there will be some that you might have to start on live hopper mice. Get them eating whatever it takes and then you can switch to your desired prey item later on.
Hope that helps and if anyone with actual breeding experience wants to correct me or add to anything i said feel free to