(black wire?) shelf on the empty wall will will hold more, drain better and be cleaner than soap build up in the niche ...btw is there enough space to have the toilet next to the vanity and have the shower wall to wall with the taps on the end wall and niche or shelves in place of the "white box"?

You will need a width of 500mm to 600mm for clothing. You will need a walking space of 800mm to 900mm. Therefore you need approx 1500mm space plus width of dividing wall. Having two levels of hanging is quite common. You just install two rows of rails, either with or without a dividing shelf. You mentioned to hang from ceiling. I'm not sure exactly what you mean. Re the wall, contact are carpenter, and they could build dividing wall out of wood and gyprock. Or you could just have a full length curtain installed behind bed. Maybe less expensive and will not take up as much space. Would also form an interesting bed head.

You should do a google search of “ teal headboard “ and there are many images which should help . Similar shades to those Dulux ones will be there . When your bed is ready , paint a few shades in strips to see what works with your bed head and carpet .

a great example of poor workmanship and household insurance won't cover that but despite the horrible surprise and expense this is an opportunity to get it right and also add your own style but first decide if you want the shower, toilet and vanity and even the walls returned to the same location?? it look's like you've done a great job removing all the damaged walls but you need to be careful about asbestos..post a plan of the ensuite and all adjoining rooms with dimensions for ideas about alternative floorplans, then, once you've decided the best arrangement you'll need a carpenter to replace the walls, plumber electrician, waterproofer, tiler and all the new tiles, toilet, vanity, shower and taps..unfortunately a very expensive surprise..the challenge will be juggling everyone to arrive in the correct sequence as well as choosing all the new fixtures and fittings so i would start with a quote from a specialist bathroom company, best of luck