To have 30 pullets at POL you need to set 100 eggs.
Pointless breeding rubbish, as the market is already flooded with backyarders and birds nowhere near what the breed is suppose to look like.
Exhibition and Utility are almost 2 different breeds now and finding any good breeding stock at this time of the year is a big ask.
I sell my POL for £20 minimum (large Fowl) and Wyandotte bantams for £15 each (POL pullets).
It' a hobby, not a way of making money. With the right breeds and stick to no more that 2 you may just cover your costs.
In my opinion Wyandotte bantams are simple to breed and easy to sell, but you must breed quality birds.