Again, the concept is to create a fairly simple, easy to assemble and functional design that can be constructed in a weekend.
While I did not actually do it over one weekend, I did it over two days.
The second day took about 8 hours. I did not subtracted my lunch and dinner time on either day. As well, the second day included painting and varnishing, which required some wait time while coats dried.
As well, I did the ramp on the third day. As well, I would like to do 2 more coats of varnish on the roof. I ran out of varnish and it rained on the third day.
Added on edit: The nesting boxes have not been done either. But they will not take too much time.