They are very difficult to keep. Even large, well-funded aquariums have a hard time keeping them.
They need a chilled tank, low 50's, and a deep or pressurized tank.
There is a detailed article in the June 2007 Tropical Fish Hobbyist magazine authored by 2 guys that worked at the NRCC (National Research Center for Cephalopods.) Otherwise there is just not much literature on the care of these cephs. You might check out TONMO if you're seriously interested in pursuing them.