An agency may employ engineering, architectural, accounting, collection, or other services, including services in connection with the servicing of loans made to participating parties, as may be necessary in the judgment of the agency for the successful financing of residential construction pursuant to this chapter. An agency may pay the reasonable costs of consulting engineers, architects, accountants, and other experts, if, in the judgment of the agency, such services are necessary to the successful financing of any residential construction and if the agency is not able to provide such services. An agency may employ and fix the compensation of financing consultants, bond counsel, and other advisers as may be necessary in its judgment to provide for the issuance and sale of any revenue bonds of the agency.