Real Estate Operator
Any individual or combination of individuals, labor unions, joint apprenticeship committees, partnerships, associations, corporations, legal representatives, mutual companies, joint stock companies, trust, unincorporated organizations, trustees in bankruptcy, receivers or other legal or commercial entity, the city or any of its agencies or any owner of real property that is engaged in the business of selling, purchasing, exchanging, renting or leasing real estate, or the improvements thereof, including options, or that derives income, in whole or in part, from the sale, purchase, exchange, rental or lease of real estate.