I agree here. Or at least this is how I did it. Although, last year I did get super serious about maintaining a flock and started researching like crazy. I subscribed to two chicken magazines, bought books, lurked here for a year and stockpiled wood stuffs & wire. And I talked to people in my town about chickens and learned that so many of my neighbors have a backyard flock. The woman across the road had them for 6 years before I realized. lolDon't overthink it.It will drive you nuts.I went through the same thing until I just said to myself I'm getting some chickens this year!!.So I did.I didn't even start building a coop until after I had already purchased chicks from the feed store.It took awhile to build too because I wanted to reuse an old playground playhouse and it needed to be torn down to the studs and refurbished.I say buy some chicks and it will force you to get going on the project.Plus they are just so darn cute.
I am rehabilitating a ton of wood to make our coop. But we also plan on letting them roam our yard in a tractor, so we are actually going to build the tractor first. My reasoning behind doing that first is so I can give them running room and outside time in a handful of weeks while we build the coop.
I now have my first 6 baby hens in my old guinea pig's cage which is placed inside an old rabbit hutch. They are hanging out in my kitchen, right where I can see them from the computer chair. (Not the ideal location, but it works for us.) The smaller inside brooder will give them enough space for maybe three weeks and then it will be removed from the hutch to give them some extra floor space and wing room inside the hutch itself. When they get to be to big to be transporting outside for a daily run everyday, we will move the hutch outside into the secured covered run. We should have plenty of time to build our coop before they completely outgrow the hutch.
Do what works for you. I lucked out with an awesome carpenter man. If I didn't have him, I would surely have gotten the coop first because I procrastinate and am not good with tools.
But I also fly by impulse, which is how the flock came to be in my kitchen. lol
Just beware of these two things;
1) What they say about chicken math is true.
2) Prepare to be completely fascinated by these little suckers if you get babies. You will lose valuable productivity time. I can't seem to take my eyes off of them. I swear you can almost see their feathers grow!