hi Cathy, and welcome to the Forum.
Trouble is, there are always hundreds of spare homeless cockerels around, and except for a very lucky few, usually those who are purebred and in some demand for breeding, they usually have to end up in the pot, which at least makes some good use of them. This may sound hard-hearted, but disposing of unwanted cockerels is really just part of hatching your own chicks, sad though it may seem. Where did you get him from? Unlike hens, cockerels grow up to fight any other males they are housed with, so either need a few hens to themselves, or live a lonely life apart from other chickens. Your large mature hens wouldn't be impressed by a little bantam youngster like him, and would probably make his life a misery anyway. Few people nowadays have room for them, or, like you, have neighbours who would object once they start to crow. I hope very much that you will be able to rehome him, do let us know how you get on, but don't get your hopes up.