Dear guys need advise,

I am planning to hack existing toilet back wall & build another toilet side by side
seperate with brick partition & different enterance.
Due to space limatition aprox 8x5 feet, I am planning to remove everything
& replace with smaller units (like in pictures) together with intallation of 2 heaters & 1 ventalation fan.

Any idea how much estimated cost ? workmanship, simen, tiles, door, bricks etc. 
I am buying the bowls, basin, heaters, ventalation fan etc..

thx in advance