Yes we are.
The feed sounds very expensive. I speak with fish market people and usually they have frozen fish they can let go of cheaply, not always sure of the reasons but it's true. I used to buy 25 lbs for $15 of low quality (poor taste to humans) marine fish called spot. That lasted me a while and I had ~300 lbs of fish to feed. I've no idea why the market owners had it in their freezers - they were Koreans and barely spoke any English.
One can make a deal with a fish market or a fish dept of a store. They have loads of cutoffs, culls, etc. which are perfect for feeding our pets.
Or one can fish.