Designates building, operating, and maintaining affordable housing targeted to primarily extremely low‑income, very low‑income, or low‑income families as a "public purpose" under the Recreation and Public Purposes Act, allowing such projects on federal R&PP lands. Requires the Secretaries of Housing and Urban Development and the Interior to create a Joint Task Force on Federal Land for Housing within 30 days to identify underused federal land for housing, streamline land transfers, promote policies that increase affordable housing, measure related costs to government entities, and deliver annual reports to Congress; the Task Force sunsets 10 years after enactment.