This has to depend on the system obviously but £60.00:
If you use one of the paint on systems (which I believe are being overlooked in the new European regs) then you will paint your surfaces and then lay tapes then re-coat tapes. The next day you will need to re-coat it all again. Most of these systems specify a 2mm covering. To do a shower wall and floor area where base sits I would say 3 hours so £60.00
If you use a membrane like Durabase or Kerdi then you put in your angle tapes lay adhesive on your area then put the membrane on like wallpaper and its ready to tile. maybe 2 hours again £60.00 quid,
If your going to do it properly then the membrane is the recomended method as you are installing a layer between tiles and background rather than trying to create your own layer.
We can sell you both but only show the membranes on the site as they are the better solution
wetroom tanking systems
tiler
..