Howdy
QueenMisha
Please do not take this as a judgement and in an effort to assist you, this is simply my feelings in answer to your question.
I am not allowed to have roosters where I live. I have, however, purchased fertile eggs for my broodies and slowly built my flock up to the maximum six I am allowed to have.
My gals are my babies and having bantams, spend more time broody than they do laying eggs; so it is a good thing that I am not in this for the egg production and they are just a bonus.
I have had a couple of little ones that I was devastated to hear crow and had to find them new homes. But, I would not consider caponizing them just so that I could keep them and instead spent time finding them new homes where they would be able to be the boys they were; crow, breed etc.
So in answer to “
If an accidental rooster became your favorite bird, would you be willing to have him caponized if it meant you would be able to keep him?”
No, I would not.
"Would you buy a capon as a pet, even if it didn't produce anything and was purely ornamental?"
No, I would not. Only because I can only have a limited number of chickens and if I was needing to increase the numbers, I would hatch eggs here and rehome any roosters.
I hope you get a few responses which help with your research and also wish you luck with your endeavour