Good to see someone else building a Liberty in Qld. Steel frame was around 20k extra but to me it was worth every penny...I hate termites and with the steel frame every wall in the house is perfectly straight. At the time the steel frame gave me a "free upgrade" to colorbond roof which was worth around 5k at the time. I think they have a special on the steel frames atm?
The outdoor room is called "The Grand Outdoor Room" - was an option on the old sc display house I stumbled across. It's 42 m2 and is really awesome if you have the space.
The plantation facade protects the front upstairs and downstairs bedrooms from the heat so totally worth it also.