It's tiny.....
....and the models are near worthless without dimensions. IMO.
I'm pretty sure I mentioned that the
@Yakisugi Coop was too small for the OP needs.
However, it references a great discussion on ventilation. It points to other coops for ventilation inspiration and discusses the importance of roost height relative to ventilation.
It references the roost size/shape they chose and why they chose it.
They discuss securing the run and what went into their decision to leave the pop door open at all times.
The page references other sites about non-toxic staining options.
They reference sites about roof pitch along with construction tips. In fact, as the entire construction process is detailed - so regardless of the size somebody is building, they can reference the steps involved.
The thought process is outlined for protecting the coop floor.
The PVC feeder pictures are better than some BYC articles of seen on them.
The nesting box discussion is as thorough as some of the others, but it highlights some important considerations.
SO ... yes, the coop is too small for the OP needs ... at the same time, for somebody investigating "Beginner Coop Needs" the Yakisugi Coop page goes over in great detail almost any consideration somebody should think about as they decide what they want to build for a coop.
Considering the OP's original interest in an elevated coop ... a stretched lean-to version of about 3.5x8 could accommodate 6-7 chickens and still be fairly manageable to clean with some good access doors.
And the Yakisugi Coop is probably one of the most aesthetically pleasing coops I've ever seen. So, of course, I wouldn't blame somebody for building something bigger copying some of the same materials/techniques.
That's is why I suggesting the article as a good starting point.