Institutional loans made and rules established under this subchapter shall be designed to:
1. Expand mortgage funds. Expand the supply of funds available in the State for residential mortgage loans;
2. Improve housing for low-income persons. Provide funds to alleviate the shortage of decent, safe and sanitary living accommodations in the State for persons of low income; and
3. Improve energy conservation. In the case of rehabilitated housing units or housing projects, improve and promote conservation of energy resources or otherwise improve the quality of existing housing.