Hi Jo
I would price like what Martin suggests, I have done a few of these now, be care full not to not under price the job, and put a price on per hour for re cleans. I did one of this size about 8 weeks ago and charged £1400 plus vat. and sent 1 cleaner 1 extra day for £85. with nursing homes they are all done now to the same or similar spec, all with a bathroom/shower with each room, if it is all tiled its a nightmare if the tiler has left a lot of grout on. I finally found the best way of removing this, that worked for me. let me know if you get the job and I will email you. cheers Phil