The other day my husband and I visited a local "reuse" store to see if they might have any suitable materials for a chicken coop. We discovered they have quite a large selection of doors and windows, and there was also a sign that said they have lumber (though we didn't look at it). These are materials either donated or taken from demoed buildings, so much of it is in Very Good condition . . . or at least good enough for a chicken coop!
I have not yet heard back from the local contractor I reached out to about building our coop, but I think my father-in-law is keen to help us out in any way he can. I supplied him with several of my design plans - including ones with an attached greenhouse - so he's going to look them over and begin doing a little research of his own. I wanted this to be a family project all along, but I also have this thing about not wanting to inconvenience anyone else. I need to remember that when people say they want to help, more often than not they're being genuine in their offer.