Commercial Leasing Agent business. Business Overview Educating yourself about the laws of commercial real estate leases and contracts can really pay off, especially if you apply this newfound knowledge and become a commercial leasing agent. A commercial leasing agent service can be set in motion for less than $10,000, and can return as much as $100,000 per year in income. The main focus of this enterprise is to source buildings, stores, and offices to list for lease, and find...