I like your MILās method. Tried and true!I agree whole heartedly with Bobbi-j. Roosters can really damage small children who can take the attack in the face. A rotten rooster have ruined the whole chicken experience for a lot of people. He should be gone.
Nearly everyone, who have had chickens for years, has their pet theory for raising them. Roosters are a crap shoot, some work and some don't. My MIL told me the secret of a good rooster is a sharp knife, keep culling them until you get a nice one.
I think the best roosters tend to be raised in a multi-generational flock. If you do dispatch this one, just ask at the local poultry club or feed store. You are looking for a rooster that has been raised in a multi-generational flock, that has at least some time free ranging, and if you get your druthers, with a good master rooster. One that was so nice, just didn't get culled.
If you want to raise your own, then pray for a broody hen, slip straight run chicks under her, let her raise them up. They will not be pets, they will give you space. Cockerels benefit mightily from NOT being the biggest in the flock while growing up. I think roosters raised with flock mates rapidly out grow them, and become bullies and respect nothing.
So I would let this one go, and ask around, or try again in the spring.
Mrs K