i am changing mine too....
to be done as the whole package under ID- it will be RM 20k excluding fittings.
size is about 8'x10'

Fitting could be a bomb depending what you choose
trying to make it a "hotel feel"

2 sink RM 500x2, 2 faucet Rm 350x2
show system including rain shower Rm 3000
WC..... now wondering how much to spend for a good hotel feel

thinking to get the Toto come with semi auto bidet.... that would break the bank like 7500 per set.