The Borough of Avalon shall provide at least thirty thousand ($30,000) dollars per unit to subsidize the creation of each very low-income accessory apartment, twenty-five thousand ($25,000) dollars per unit to subsidize the creation of each low-income accessory apartment, or twenty thousand ($20,000) dollars per unit to subsidize the creation of each moderate-income accessory apartment. Subsidy may be used to fund actual construction costs and/or to provide compensation for reduced rental rates.