Daffy's right. Decorators I know charge so much per roll which takes time into account. Have been quoted on a few occasions and the prices varied enormously. Have you thought about getting a few estimates?
An hourly rate is an hourly rate, it doesnt matter how big the house is.
A smallish 2 bedroom house actually means nothing, smallish compared to what?
I have lived in 2 smallish 2 bedroom houses, one had a huge lounge one had a tiny lounge
try giving the size of the room, the age and condition of the room, who is paying for materials etc, will the original wallpaper need stripping are the walls damaged or like new.
I had someone in to emulsion my bedroom 3 walls & wallpaper 1 wall. Bedroom avarage size no cieling, no other painting, came in at 9-30am finished at 5pm £190.00 gave him a tenner & numerouse cups of tea & biscuits.
Ah thanks so much for replies folks. I guess its done by the hourly rate. it isnt for me but a friend of mine. I have to go out now as she is moving on monday and have to give her a quick visit before she moves xx Thanks again