My Anticon is R1.3 from Bradford https://www.bradfordinsulation.com.au/home-insulation/roofing/anticon for colorbond roof and the cost for the Anticon blanket is $3000 for a 32 Sq house. However, I am using R3.5 batt for ceiling and that is separate.
Hey Murtuza what's the update on your block, your house plan look good its a decent size house.
What is your land size?