it will cost bout 4K for the:
1. Water Proof Plaster Ceiling
2. Wall Tiles and workmanship
3. Water Proofing the floor and tiles
4. Change ur bathroom door
5. Change position of piping, now the toilet bowl and sink seems located oppositely in new design.
6. Hide the 2 big at corner pipes.
Other stuff
1. Toilet Bowl
2. Ventilation System (I seems saw a ventilation system on the side there)
3. Sink and the aluminium cabinet (not cheap here)
4. Rain shower
5. Shower Screen probably needed to divide ur bath area and toilet bowl
6. Towel hanger, clothes hanger, misc stuff
7. Don't forget lighting is important as well
Total : 8K at least my point of view.
BTW, I wanna change my both toilet... if 4k without accessories 2 bathroom cost me about 10k...