Before you get into things too deep I would construct a couple coops with attached runs so you can keep more than one flock even if each only a couple of birds. Never let more than one flock out at a time to prevent total loss. Look into setting up with hotwire fencing of some sort to keep...
I keep American Dominques and breed them to meet the SOP.
How serious are you about a breeding program? What kind of space and time can you devote to it?