They're quite difficult to breed too from what my friend was told. Young cockerels only or you have to do AI because the adult males are just too large. Itnalso takes a good while to get that size, as well as an alarming amount of feed
Certain strains of Brahma get that large (my chicken friend looked into getting some from a judge but decided against it when he saw the price tag). But you will have a very tough time finding them. Regular hatchery brahmas tend to be the same size as most standards