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 decent, safe, and sanitary dwelling accommodations and that no housing authority shall construct or operate any such project for profit, or as a source of revenue to the State or municipality. To this end an authority shall fix the rental for dwellings in its projects at no higher rate 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 source derived, will be sufficient:
24 V.S.A. § 4009