well, okay...after all that..i guess the market would be small! hahaha..they sure are beautiful to look at though..Yes to everything you mentioned, LOL. Ours are less than a year old. There are some experts that can give a better perspective.
They are expensive to buy and maintain, prone to diseases like blackhead. Obnoxiously loud at times, brutal to other birds they don't like, and too stupid to roost inside until you remove every roosting place from their outdoor yard.
And we love them. Go figure.
Our hens will never free range, we have too many predators. The spare male might get let loose when we separate the pairs for breeding, unless we can sell him, but not that many people have accommodations suitable for a peacock, so the market is small.
I have a friend of a friend ..hahaha, they have a farm and raise peacocks. It looks so neat, they just hang out on the fence, out the big-top barn window and there are outside steps going to the second story of the barn..they lay/roost all over them..I know nothing about peacocks, only that when you pull in they all start screaming...hahaha..their neighbors are far enough away that it is not an issue...

The woman is the one who is really doing all the raising, she has bundles of peacock feathers everywhere...she sells them to craft and fly fishing places...