It is hereby declared to be the policy of the State that each housing authority shall manage and operate its farm labor centers in an efficient manner and that it shall establish the rentals for dwelling at rents sufficient to cover costs of operation and maintenance, including amounts necessary for payments in lieu of taxes and creation of necessary reserves, and the payment of currently maturing installments of principal and interest on any indebtedness incurred in connection with the acquisition, construction, or improvement of such farm labor center.