It's about 10k a sheet I think 1200x3000

Not that I've got one but have heard rave reviews from those who have it... I can see merits in it particularly if it's for like a built-in laundry say in a hallway for example as you wouldn't want your washing hanging out there for all to see... but if you have a separate laundry room with a door, then I think it's either/or depending on your budget I guess (not sure of cost)... you can also achieve a similar result (which is what we're doing being in Melb too) by having wall mounted racks (that fold down when not in use) and put a heating vent in the laundry room (vent particularly good if you're planning to have a dryer coz of condensation)... good luck :)

Hmm I find this highly unlikely, I used to be in wholesale internal sales selling Q-Stone a slightly cheaper version of Ceaserstone and we knew for months what the prices would be and could fix prices for our stonemasons I would ring around and get some other quotes.

Get two more quotes. It's not too hard to do yourself if it's outside your budget. Just need to ask your hardware store for the proper equipment and follow the instructions. The other way to look at it, is that wallpaper isn't cheap, and is it worth it to you to have it hung well?