Once you know the total sqm's of living, dinning and family areas then you can calculate the figure for labour and material cost. It may be cheaper or same.
But if you do tiling from Mirvac than you get 7 years warranty with it while you don't get that with 3rd party tradies.
I've asked to align my family and bed 4 wall to adjacent walls so to get bit bigger rooms, Alfresco & its tiling. Plus doors for walk in wrobes and bed4.