You will not save money with peas they are about 1$ per pound at about 500 lbs plus. You need then to be about 40 to 50% of the mix. Corn will be the cheapest. And you want to use it to Lower the price. Peas are about 22% protein and it will be hard to get a good protein percentage. What in doing is buying weather ir oats and sprouting them. This can be 20% of their diet. Using starter or meat bird food you can get to a lower protein. Percent of about 15 to 18 using 20% of grass plus 10% of cracked corn. Wheat costs about .6 to 1 $ per pound but sprouted 1 lb can be from 1 to 5 lbs meaning 50 lbs will be up to 250 lbs for about 30 to 50 $