This looks great!This one comes with windows, and looks like multi levels already started. I could see expanding those levels later
https://www.homedepot.com/p/Handy-H...pinstock-_-100350323-_-202205311-_-N&#overlay
Note that the video states it doesn't come painted nor with shingles nor floor decking...1 day of assembly plus painting, caulking & shingles. It would probably end up costing a less & she would have more space, bur would have to add vents, nest boxes, pop door and might (?) need to tweak people door so the chooks don't escape when she needs to go in to feed/water before work. (Both need roosts, so didn't mention those) The prefab has the nest boxes & venting and pop & people doors.
If she has the time to do this, it would be larger (a little over twice the size!), and even with shingles, paint & decking, still cheaper...just more time/work.