Which comes first, the chicken or the coop?

Mark and I are having a fundamental difference of opinion.  Here's how it shakes out:
He thinks if I buy some baby chicks, in the couple weeks they have to hang out indoors, he'll be wildly motivated to finish the coop.  A irrefutable deadline, he thinks, is the only thing that'll truly light a fire under his ass.

I think it's asking for trouble to get chickens when their home isn't ready.  I also feel like it's a bad idea to commit to a life with chickens when one partner isn't actually, um, committing.  Besides, he was going to work on the thing all last weekend and got sick, so did not.  What's to stop the universe from throwing up another delay?

I see his POV.  I really do.  I just can't get on board with it. 

He thinks I'm crazy.

Interwebs, where do you fall on this classic debate?  Which one SHOULD come first: the chicken or the coop?