I have a whole wall that I need to block off with some sort of door. I'm thinking that a bi-fold door would be awesome. However, my husband kind of wants a sliding door. I just think how cool it'd be to have a whole wall made up of a door that could easily be tucked away when needed. This would make outdoor barbecues a lot easier. It would sure save me from having to open the door every time. http://www.superiorwindows.com.au/content/Products/BifoldDoors.aspx 

can put in skylight if you need more light ? more lights ? or build your fake wall a bit in and only high enough to hide the windows but not all the way up to the ceiling so you let in light from your 3 windows?

Yes. Axolotl are amazing! I have sourced a company in Melbourne who pretty much do the same thing. It's Metalcote in Cheltenham. The bronze/graphite sample I have attached to this post is from there. It's liquid metal. Axolotl are in Sydney and the cost of transporting door to and from there, plus cost of coating, is way expensive. Coating alone, minus cost of door, is around $2500+/- I figure for the same product I won't have to pay for return delivery of a heavy door

No seperate laundry - WM is in second bathroom. Clothes line as per pictures (top right). Sliding doors lead to the garden (paved). Shower room is 1.76 x 2.37. Bathroom is 3.17 x 2.05 (plus toilet on top on length). width of hallway is 1.5 but has a slight shift to the right where the kitchen and living doors are. 3.45 m long until the doors start. The roof will be a nightmare whatever we do. Main house (bed 1, living/dining, kitchen and shower room) are tiled, beds 2 and 3, lobby and bathroom sloping corrugate. Pergola is an apex roof parallel to the back wall (yes, it leaks). No budget, but would obviously prefer as little plumbing and wall movement as possible. We are coping with the current horror of our living conditions quite well so we will just keep saving until we can afford what needs to be done.