We use to raise meat for personal use and to sell.
Cornish Cross is the go to, but
Poulet Rouge are fryer size, taste better and more hearty that the Cornish X. They do take a week or so longer to get to size. They are delicious and can be sold for more than the X.
The Poulet can be free ranged.
Make sure your neighbors are ready to slaughter when the birds are. There's a time difference between fryer and broiler size.
The Cornish are delicate. We raised them in chicken tractors and had to be very careful of the heat and moisture.
Don't overcrowd then, but don't give them to much room.
Cornish will literally lay down by the feed and put their head in it to eat, blocking other birds from eating. If you kill them late, their knees are giving out and weird, nasty shit is happens with their organs...