The Department may award a technical assistance grant to a political subdivision or nonprofit organization to help families of limited income that are owner–builders or self–help rehabilitators. A technical assistance grant under this section shall be used to: help, train, and supervise owner–builders and self–help rehabilitators in self–help construction activities and techniques; help in project development, including: preparing plans for self–help housing; preparing contracts for professional services; applying for financing; packaging applications for assistance; preparing subdivision maps; reviewing engineering plans and specifications for construction and rehabilitation projects; and complying with the requirements of political subdivisions and funding entities; and pay the administrative costs of providing technical assistance for the activity that the Department finances. A technical assistance grant may not be: used to purchase land, materials, tools, or construction equipment or to pay for construction costs; or awarded for a project of fewer than six dwellings.