Mealworms are relatively easy to care for.
I am working on raising mealworms at the moment for my fish, but I beleive you really need to start with a reasonably big culture so that you can feed them out.
you do however from time to time need to change the bran flakes as the mealworm poo accumulates down the bottom and smells like ammonia.... then kills the mealworms.
Big bin works well.
If you can go to a grain store like wrightsons, RD1 or PCL you can pickup large bags of Bran flakes (chicken feed) reasonably cheaply. Beats paying $5 - $6 for a small pack from the supermarket.
I hope to have an article on this in next years AW