Can you buy from a local mill and cut out the middle man?
Can you buy bulk from that mill and save even more? Bagging is very expensive because it is labor intensive at the mill.
Can you find a restaurant that will save you scraps--this needs to be picked up often to keep from spoiling.
Can you have old produced saved at a grocery store?
Would any of your neighbors save scraps?
When I have feed my family chicken, there is always tiny peices of meat still on the bones, mostly ribs and neck areas. My chickens pick it clean.
In the desert, the grasses are sparse, and there for the animal density is sparse. Perhaps with a little inginutity you can grow red worms which are garbage composters. Despite the chickens, dogs and cats eating all my scraps, there's still some so spoiled it heads to the compost. This is suitable for the red worms aka red wrigglers. TO get a few pounds you can order online but they don't ship in the winter as the worms can't handle the cold.
Can you grow grasses that are desert tolerant?
My girls head to the horse manure compost piles and when the used shavings warm up the fly larvae are very popular. THe girls remember where to go look too!
I often cover areas to hold the moisture to promote earthworms and such. Perhaps covering a compost pile to hold the moisture might promote larvae, etc.
GL