There's more to the required funding than just the capital expenditure but who knows what that would have ultimately cost under Labor given the state of the rollout when they left office.
I should have added the link I was referring to
http://www.theregister.co.uk/2015/02/24/nbn_co_fibre_build_was_close_to_budget/NBN Co describes the model Morrow and Rue presented yesterday as representing "fully allocated costings" that represents "the true and full cost of building the network" in greenfields, brownfields and fixed wireless areas.
The cost fell, however, between June 2014 and December 2014, reflecting the impact of new deployment practices (such as using smaller splitters and thinner cables).
I have my doubts that these practices only occurred because of the new NBN co board under the coalition government, like any repetitive practices done it just takes time to get through the initial problematic issues and then more efficient ways will be found as well as technological developments.