There is only one good solution to an aggressive rooster, and it is not to rehome him. He could do serious injury to somebody else's child. Do NOT release him somewhere, hoping nature will take care of the problem for you. That is both cowardly and cruel.
We are fortunate enough to live near some Mennonites; when I have birds that are ready to process, I take them there and they take care of it for a very reasonable fee. Is there a butcher or meat packing plant near you? If all else fails, see if your vet will put him down for you, but this will be the most expensive option.
@jus10inla 's suggestion, known as the broomstick method, is the fastest and easiest. Good luck!