Native American Housing Assistance and Self-Determination Reauthorization Act of 2017 This bill provides federal housing assistance to Indians, including Alaska Natives and Native Hawaiians, including by: amending the Native American Housing Assistance and Self-Determination Act of 1996 (NAHASDA) to reauthorize through FY2022 and revise the Indian Housing Block Grant and the Native Hawaiian Housing Block Grant; amending the United States Housing Act of 1937 to authorize the Department of Housing and Urban Development (HUD) to implement a supportive housing and rental assistance program for the benefit of Native Americans; amending the Housing and Community Development Act of 1992 to authorize HUD through FY2022 to guarantee housing loans for Native Americans and Native Hawaiians; extending from 50 years to 99 years the limit on the lease of Native American trust or restricted lands for housing purposes; and establishing a demonstration program that requires a participating Native American tribe, with an investor partner, to develop and implement a HUD-approved plan to address the tribe's housing needs.