He produced plans and drawings, liaising with suppliers to obtain costings for the pumps. The official policy costings did not contain specific funding for the project. The Government criticised the Liberal Opposition's costings of policies. He recommended a purpose built lunatic asylum and submitted plans and costings. In 2013, Leigh served as the Government Spokesperson on Opposition costings. He did not find favour because his costings were thought to be wildly optimistic. So far these costings have not been released. Other costings have been as high as $3 billion.