I agree, hatching is awesome and an addictive experience, but you can not guarantee pullets that way. I have hatched many chicks this year and one batch had 11/14 end up being boys, then you have to find homes for them. The OP wants pullets, so better getting sexed pullets from a hatchery in that case. Good luck with your chicks. I have heard only good things about Hoovers! 
