Ok straight out practical here. 3 big questions.
1. Are you sure you can make $ on 20 a pullet? Think feed costs feeding both boys and girls until you can sex them, cost of incubating (this is a lot less for many eggs however) and electric for brooding. Spreadsheet this and make sure.
2. What are you going to do with 300-400 boys? You have to grow out for 2-4 months to sex depending on breed and they are only big enough for soup at that point. You may make more profit selling all at 5 straight run.
3. Can you sell 300 pullets??? We are past prime buying time and sales are sloooow. I could see selling 300 in January when its hard to get chicks or pullets can you hold them that long? People won't buy practical over xmas and no one wants to pay for feed for 3 months over winter knowing they won't get eggs till spring.
Smaller issue. You will get some sexing wrong whats your plan for oopsie roosters if you are done hatching and they ask 2 weeks later?
Those are the practical stuff id answer before putting thousands of eggs jn a bator.
^^good points


