A few years ago we had hens to produce eggs and as "pets." There is an American, and maybe, English expression, "That is chicken feed." meaning something is inexpensive. What we discovered about chicken feed is that the good stuff was not chicken feed, ie, cheap. If we used cheaper chicken feed we got less eggs and the quality of the eggs was diminished. When we went back to the more expensive chicken feed we got more eggs with better quality. But which chicken feed was better from a money perspective? We never did the simple math to figure that out since the hens were also pets.
Now, from a money perspective I could get better eggs, cheaper at the store, but the family wanted hens so we got some hens.
If you are going to be raising chickens for money, you will have to figure out which chicken breed(s) puts on weight in the least amount of time, with the least cost in chicken feed and other expenses to maximize revenue and profit. The chicken breed(s) that works best in my area may NOT be the best breed(s) for your area.
Hopefully, your local government has information on raising chickens. This is common in the US were many states have agriculture extension offices that provide advice on raising crops and animals. If a US state has a similar climate to yours, you could see if they have an agriculture extension office that has information on raising meat chickens.
Later,
Dan