Get a tile cleaning product from Bunnings. Will ensure that the integrity of the tile is not compromised. However, by the look of the stains it seems as though something has been used that was too abrasive, too acidic or that had bleach in it. I do not recommend to keep any product on for an extended period of time. 5 mins max application!

Though I don't know for certain, I think the cotton/linen shades are removable. I wasn't able to determine this by my searches. This could easily be confirmed by making an enquiry to supplier before purchase. Alternatively, a handmade one could be made removable by making shade slightly larger than frame and making ties.

I’m glad you like it Irove. We have done similar changes to our house. -I’m not sure what your council will require in regard to your changes. Ours was only for the fitting out the supporting beam. Ours was supporting an upstairs area, whereas yours may only be supporting a roof truss or not. So I’d check that out first. Worst case scenario, you may need a supporting post. All of the work for this can be done by a registered carpenter. Get quotes! -There are kitchen companies that do flat pack kitchen but also offer the added service of an installer at a very reasonable rate. My daughter had her whole kitchen installed, including electrics and plumbing for $3500. They could also do your WIR and vanity downstairs and coffee bar.😜 -Downstairs, all the plumbing is already existing, you can work with this. Check with your local council about any certificates you may need. I am wondering if downstairs maybe on a concrete slab? If so, there is amazing work being done now with polished concrete. Check it out. Back to the bathroom. We bought all our plumbing fixtures and fittings on line for a fraction of the price that any bathroom company charged. We bought our tiles from a bargain tile place, (larger tiles are cheaper and quicker to lay and less fiddly) they suggested a tiler. We called in a plumber to fit out the bathroom. You will also need you carpenter to be involved in this. Get all trades together before you even start. Work out your plan, if you keep most of your amenities in place, it will make it cheaper. That doesn’t mean you can’t update them. Good luck, if you do go with this!