Promoting Tourism to Enhance our Economy Act of 2017 This bill authorizes the Department of Homeland Security to admit into the United States as a visitor for pleasure a qualifying Canadian citizen over 55 years old and his or her spouse (who is not required to be over 55 years old) for a period not to exceed 240 days if the person: (1) maintains a Canadian residence and owns a U.S. residence or has rented a U.S. accommodation for the duration of such stay, and (2) is not inadmissible or described in any ground of deportability. Such person may not: (1) engage in employment or labor for hire in the United States, or (2) seek any form of assistance or benefit under the Personal Responsibility and Work Opportunity Reconciliation Act of 1996.