(a) The Secretary is authorized to provide financial assistance, including loans having a maximum maturity of fifteen years and in amounts not resulting in an aggregate principal indebtedness of more than $3,500 at any one time, to any low-income rural family where, in the judgment of the Secretary, such financial assistance has a reasonable possibility of effecting a permanent increase in the income of such families, or will contribute to the improvement of their living or housing conditions, by assisting or permitting them to—
(b) The Secretary is authorized to provide financial assistance to local cooperative associations or local public and private nonprofit organizations or agencies in rural areas containing concentrations or substantial numbers of low-income persons for the purpose of defraying all or part of the costs of establishing and operating cooperative programs for farming, purchasing, marketing, processing, and to improve their income as producers and their purchasing power as consumers, and to provide such essentials as credit and health services. Costs which may be defrayed shall include—