Anyone give a rough guide on converting bathroom to polished concrete floor?

Hi,

Wife wants to do polished concrete floor in the bathrooms.

The house is on peers (is that the right term? photo below)

Now everything is possible with enough money.. but I think to do something like that is going to be a serious number. (100K. ?)

So asking if anyone else has done this and what you've ended up paying.

Bathroom is around 3 X 3

https://preview.redd.it/2ffhgu51myog1.png?width=643&format=png&auto=webp&s=eb3f2223abfdb4afc97adec85368c7589ca77f6c