i personally never feed my cichlids feeders. just because i dont want to take a chance in passing a disease from a feeder to my cichlid.
even by breeding your own feeders, you can run into problems with disease. just make sure you keep the water quality very good in the feeder tank.
as far as mass breeding them goes.... just get a 55 gal tank and get a couple handfulls of them. they breed like rabbits.
i would recommend feeding your red devil, whole shrimp as a substitute for feeders.