“financially sustainable"

in relation to the provision of a municipal service, means the provision of a municipal service in a manner aimed at ensuring that the financing of that service from internal and external sources, including budgeted income, grants and subsidies for the service, is sufficient to cover the costs of —

(a) the initial capital expenditure required for the service;
(b) operating the service; and
(c) maintaining, repairing and replacing the physical assets used in the provision of the service;