i would imagine you would pro have a waiting list for some breeds and then you could offer assortments like the big hatcheries do...
you really needto consider the "leftover" chicks.... you cant possibly give away that many birds and make a profit....
say someone orders 25 chicks, so u get 50 eggs,, say you get 35 hatch, thats 10 leftover... youd havr to find a buyer for 10 specific birds... or same senerio, you only have 22 hatch them youd have to tell your customer you couldnt fill an order ..... or aay you actually got all 50 eggs to hatch....
youll need alot of spare coops/brooders ready to go to hold leftovers