I have 50 meat birds in the house as well at the moment. They are a week old(ish) and yes, they produce a TON of poop!! I originally had them in an extra large dog crate, with newspaper, kept at 90 degrees. They seemed to really spread themselves out, and just yesterday I moved them into a kiddie pool. One heat lamp and although it looks crazy, I have the whole thing draped with sheets to hold in heat and keep drafts out. It stays between 75 and 80 and they are still spread out nicely. Yes, when I pick them up they are hot. With our crazy up and down temps lately, I'll deal with the smell until they level out a bit.
I am terribly new to all of this, and worry about them. I have one who has messed up legs, but I'm letting him fend for himself. He is doing ok, making his way around the best way he can. I cannot get attached as they are meat birds...lol...but this little one is kinda special, such a strong will to make it! Ah well, time will tell.