4. Converted properties. All properties converted to affordable housing pursuant to this section shall meet the minimum standards of habitability, safety and quality of life for all established housing. Additional operating expenses shall be met through any combination of subsidies, vouchers, commercial rents, or other sources of income available to the housing provider under the model the non-profit chooses to pursue. All units shall be rent stabilized as defined in this article in localities that have adopted or opted in to the rent stabilization law. At least fifty percent of all converted units shall be set aside for individuals and families who were experiencing homelessness immediately prior to entering such converted affordable housing. Each unit must contain, at a minimum, a living/sleeping space, private bathroom with bath or shower, and either a full kitchen or a kitchenette with at least a 7-cubic feet capacity refrigerator, sink, cooktop, microwave oven and outlets for countertop appliances.