There is nothing wrong with the way you have handled things. I applaud you for your resourcefulness and industriousness. There are many on here who are in the same situation, or one that is not much better.
I think perhaps your point is that it seems excessive to put hundreds or thousands into a coop when there are starving children in the world, even in one's own town. And this may be a valid point at times.
I also think that in most cases, if you read closely, you will find that the poster really did not spend an excessive amount. For example, this forum has over 30,000 members. Chickens do not tolerate heat well, and a good number of us live in the south. I'm sure someone somewhere has an air conditioner in their coop, but I have yet to read of it. (Mine would have loved it today!) And I imagine that if you could have comfortably afforded a couple of hundred for lumber, you would have bought it, rather than spending the time and energy it must have taken to scrounge it.
You also said that people should feel free to spend their money as they choose. I think if you will look closely, you will see that most of the attractive or "cute" coops were built by their owners, and that the "cuteness" really does not amount to much more than a bucket or two of paint and a few extra boards. And in many cases, as has already been pointed out, this was necessary to appease neighbors or HOA's.
I've spent maybe $300 on 2 coops and a large electrified yard. You won't find my coop in the coop section because I don't own a camera. My coops total about 200 sq ft and the yard is about 5600 sq ft. One of my two flocks free ranges so has no yard. Cost me about $40 to fence my garden so the free range bunch would leave it alone. I gather this is more than you could have afforded, but I could manage it, and I think you will agree it's hardly a big outlay. I really don't think I'm much different from many on here.
I'm honestly not arguing with you. I'm trying to make you feel a little better about all this.
BTW... SOOOO glad I do not live where the length of my "grass" could be an issue. Most of my so-called lawn is mowed weeds, and most of my property is unchecked weeds/trees/whatever.