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Greetings! If your goal is to become a breeder, you want to aim at a certain level of autonomy, meaning freedom from the continuous importation of new blood, which will undermine your progress via introducing too much variability. You might want to think about, say, three breeding pens per breed. This wouldn't necessarily mean three houses, perhaps one house subdivided with chicken-wire into three or for inner compartments (depending on the size of your facility).
Then you want to consider where you're going to raise the chicks each year, for they can't grow up with the adults. It requires either two spaces, or one subdivided into two parts, for you'll need to separate the cockerels from the pullets by, say six to eight weeks of age.
The two breeds you selected are not easy to begin with, but if they call, they call. If will actually be easier to find quality stock in the Polish than the Crevecoeur. There is no more high quality stock left in Crevecoeurs. Anyone wanting to breed Creves needs to be willing to take them from a difficult place, breed heavy and cull heavier.
For both of these breeds, you would probably want to join the Polish Breeders Club. They have a strong club, and they would provide support and advice. Plus, they'd know where you'd find the best stock. If you start with low quality stock it will take you half a decade to get up to where you could have begun with a slightly greater financial investment. It's so worth it, though. An extra $100.00 at the beginning is only $20.00 a year over five years of "well begun is half done".
In the end, you might find it more rewarding and a stronger foundation. If you start with one breed you'll find your feet as a breeder, and then when you go to another breed, you'll know what you're getting into. When people start out with too many breeds, it often ends up discouraging them because they find themselves too overwhelmed to make progress. Each breed is a story and a rhythm to adopt.
Best of luck!!