It is hereby declared to be the policy of this state that each housing authority shall manage and operate its housing projects in an efficient manner so as to enable it to fix the rentals for dwelling accommodations at the lowest possible rates consistent with providing adequate, safe and sanitary accommodations, and no housing authority shall construct or operate any such project for profit or as a source of revenue to the county. An authority shall fix the rentals for dwellings in its projects at no higher rates than it shall find to be necessary in order to produce revenue which, together with all other available moneys, revenues, income and receipts of the authority from whatever sources derived, will be sufficient:
Idaho Code § 31-4212