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Me and my practical self, my initial thought on all that insulation, vaults, soundproofing, etc is that the AC bill will be astounding. You'll need to have a full vent and return exchange in every room as they're all going to need to be heated and cooled independent of each other since air won't be flowing freely between them. Some property in an unincorporated area with an outdoor range and a silencer will probably come out much cheaper.