I'll tell you what, that many makes a big mess, they smell more and they wind up sick or injured and it's hard to keep track of symptoms and such. We had nearly that many when I was in high school, and it took a LOT of time. We lost quite a few because we didn't have enough isolation pens, and couldn't seperate them from each other properly when there were injuries and fights etc.
Past a certain number (which is a flexable fulcrum really) chickens become a nearly full time job.
We had lots of eggs to sell, but because we weren't prepared, (and back then (yes I'm old) there was no internet or BYC! **gasp**) we lost a lot to predators and illnes, and even chickanableism. We were in no way prepared! There were many hard lessons to learn the first year... ok, and a few more the second year!
I seriously advise you to plan ahead for isolation pens, brooder pens, and seperate secitons for agressive hens and roos, and extra timid hens or roos. With a large number of birds you can have ALL of THE ABOVE at any given time!
I'm not saying don't do it, I'm saying plan ahead if you choose to.