I just have baby monsters... but between the crickets, feeders, krill, mysis shrimp, brine shrimp, bloodworms, Earthworms, shrimp pellets, veggies, cichlid pellets, and so on, I think I've gotta be over 50.
I ahve 2 Oscars, 6 Orino PBass and a Blodd Parrot and mine is less than $5. Native fish chunks is the way to go! Feeders occasionally...but I get them for about $0.50/doz at the bait shop 1/4 mile down the road.
I only really buy flakes, pellets, brine shrimp and bloodworms. But when I do its in vast quantities and thus in bulk. Probably equates to 4-5 a month.