I use pasture forage to bend the curve a bit on my feed costs, and happen to be blessed with one of the better climates for doing so, here in the US (though certainly not the best soil). Rather than engaging in large scale commercial farming type activities (which will likely still be more expensive than buying a locally milled commercial feed), I've planted my acres of weeds with a biodiverse polyculture, which I continue to improve by overseeding each year, and selevctive weeding. I call it my "
acre of weeds".
Seasonally dependent, saves between 15% and about 35% against my expected feed bill, for the size of my flock.
You don't say where you are at, but if you have a long, mild growing period, decent soil, and enough of it, then -
when mother nature cooperates - *if* you have enough variety, you can set them free to forage with few concerns about major dietary imbalance.