Australian Heat Pump Hot Water Rebate & Payback

{'type': 'object', 'required': ['postcode', 'current_system'], 'properties': {'people': {'type': 'number', 'description': 'household size (drives hot water demand)'}, 'postcode': {'type': 'string', 'description': 'AU postcode — rebate eligibility is postcode-gated'}, 'locally_made': {'type': 'boolean', 'description': 'an eligible locally made unit, which raises the Victorian caps'}, 'current_system': {'enum': ['gas_storage', 'gas_instant', 'electric_resistance', 'none'], 'type': 'string', 'description': 'what you have now'}, 'owner_occupier': {'type': 'boolean', 'description': 'tenure — gates the means-tested state rebates'}, 'property_value': {'type': 'number', 'description': 'property value — Solar Victoria requires under $3,000,000'}, 'replacement_due': {'type': 'boolean', 'description': 'true if the existing system is failing and you were replacing it anyway'}, 'household_income': {'type': 'number', 'description': 'combined owner taxable income, for means-tested schemes (Solar Victoria caps at $150,000)'}, 'system_age_years': {'type': 'number', 'description': 'age of the system being replaced; Solar Victoria requires at least 3 years'}, 'building_age_years': {'type': 'number', 'description': 'age of the building; Victorian Energy Upgrades requires at least 2 years'}, 'gas_only_for_hot_water': {'type': 'boolean', 'description': 'true if hot water is your last gas appliance, so the daily supply charge can be avoided'}}}