Set up the Coral system as two large tanks, with lve rock from your ocean. then make a huge sump out of any thing watertight. If you can get clean ocean water twice a week, you will still need a protein skimmer ,but not a huge one. Fish system needs to be smaller tanks or cubicals. The more individual systems the better. If one fails then you have others to transfer. If your sea water is free then use it. a huge sump means you can change the water without having to lower the water in the fish tanks or coral tanks. If you are importing fish , you will need to be able to match the phhe system that you will be tranfering the new fish into, then slowiy raise the ph back to 8
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Honda ZB50