Update on seed costs/findings.
A local chicken FB member gave me a reference for a feed store in Phoenix. They had whole wheat seed for $26 for 50 lb. bag. Feeding daily the fodder grown from 1/2 cup of seed, it works out to roughly $3.50 total for one month. That's a far cry from the $22+ per month at the higher priced feed!
So at this low price, I'm happy to continue feeding fodder.
I haven't yet finished my latest bag of pellet feed to calculate any resulting reduction in their pellet consumption. I want to see if there is any noticeable difference. Our current heatwave may affect the outcome though. We've had sustained heat above 105 (currently 116) for a week now and it's expected to continue another week.
Another observation I've made is that they tend to be most interested in the sprouted seed parts of the fodder. For now, I'm continuing growing as fodder so I can calculate affect on feed consumption. After that, I will test out feeding them just the sprouts (3 days of sprouting) rather than the 7-days growth of fodder.