We have 20 baby chicks coming, 10 buff orpingtons and 10 barred rocks. We have cleared out the old chicken coop which is 12x8, and I plan on extending out one wall to accomodate 15 new nesting boxes with oak branches for roosting along the front, and additional roosting branches along a shorter wall. Since we are newbies to this, will this be adequate for them? I want to keep the coop rustic since my grandfather built the farm we are now trying to homestead. They will be free range and only locked away in there at night. Any ideas or suggestions?