According to the 2008 Book of Discipline, ¶658.4,

The district conference may incorporate a district [church] union, under the laws of the state in which it is located, to hold and administer real and personal property, receive and administer church extension and mission funds for use within the district, and exercise such other powers and duties as may be set forth in its charter or articles of incorporation as authorized by the annual conference having jurisdiction over said district. If a district union is so incorporated, it shall also assume the power and duties of the district board of trustees (¶2517.2). All such district unions chartered or incorporated by districts of the churches that joined and united in adopting the Constitution of The United Methodist Church are declared to be disciplinary agencies of The United Methodist Church as though originally created and authorized by that Constitution and may act for or as a district conference when convened for that purpose by the district superintendent, who shall be its executive secretary, or by its president or other executive officer.

Our RV district church union supports local churches with financial assistance when necessary, i.e., building repairs, and also provides physical help/volunteers for any work or repairs needed at the church level.