$4,000 for that???? Your parent got seriously ripped off. To say nothing of the problems with completely inadequate ventilation.
The "thumb rules" for chickens.
4sq ft house space/bird
10 sq ft run space/bird
1 sq ft 24/7/365 free ventilation/bird
1 linear ft roost pole/bird
1/4 nesting box/hen (minimum 2, round up)
[this is "flexible", I've seen 1/5 given as this rule as well]
1/10 Rooster/Hen ratio for optimal fertility
[this is another flexible thumb rule, young roosters can effectively cover more young hens and still maintain good (85%+), if not great, fertility]
Expect leaks at the joint where the nesting box roof meets the wall. If its typical design, expect birds sleeping in the nests, because the roosting bars aren't high enough. You have to leave the window open all the time, which still doesn't provide enough ventilation for that many birds, but puts drafts - which you desperately don't want - on them as they roost. The space underneath will be a constant source of frustration for you. If you are lucky, they will only dust bathe there. If you aren't, they may lay eggs there, and its a popular place for uninvited guests to hang out until you predator proof your run (rats, snakes, etc)
Should I continue???
and lest the parental units think I'm saying this simply because you requested it, or in the belief I am young myself...
See my Sig, below, for my current flock. I'm in the later half of my first century, and I can link posts making similar observations about similar coop designs, going back some considerable period of time.
There are *worse* coops, don't get me wrong - but for the expense, the builder really should have done their research, then built something more appropriate to your region.
Your whole run, if I'm judging the locations of the 4x4s correctly,
is roughly the size of the goat house I built one weekend. Alone. With only a generator for power on site, and a bunch of materials I had to carry to the job. No, its not as pretty, but its just as functional, and was 1/4 the price while lumber costs were thru the roof. Could easily add doors and windows with the money saved.