Most horn sharks require chillers, which will run you $1,000 and up. You will also need an aquarium of at least 300 gallons. You will need a very large sump, UV sterilizers, Protien Skimmers, and lots and lots of salt. You should also have knowledge of saltwater aquariums before keeping a shark. They are very messy and will require large water changes (35%-50%) every week. Feeding is not difficult, you could probably just get some shrimp from a store and give him about 5 large, peeled, uncooked shrimp every 3 days. I am not sure if a Horn Shark can withstand live rock, since they are bottom dwellers and they may scratch themselves on it, which causes very bad wounds. If you have any other questions, I'd be glad to help you out!!!