I've had a lot of experience working on hotels. Holiday inn, Crowne Plaza, malmasion, abode, best western, novotel and camponile to name a few but I've never priced one of these for myself. Thing to remember is that most of the companies quoting on hotels will have offices full of people and their wages will be taken in to consideration with quotes so I think it gives you a bit of room to be competative.
I would also say that although I've never quoted on a big hotel I would be very happy to and cofident in my skilling at pricing one up. I've quoted on office blocks this size and been the successful bidder and made a good profit on them so I'd be happy to quote a hotel.
I would quote it the same a you would for any other building. Don't estimate an hourly rate as you could be miles out. I would go with the price per window, for example.
The hotel has 100 rooms, say for arguements sake 25 rooms on each floor with one window per room. 25 on the first, 25 on the second, etc. The fed say charge a pound for a first floor window, £1.50 for a second floor and goes up by 50 pence per floor. so with this you would look at £25 the first, £37.50 the second, £50 the third and £62.5 which equals £175 and any bars, restaurants and entrance areas on the ground floor.
Remember this is a guide. Once you have worked out the price I'd stand back and have a think. Maybe you feel the window are big ones and you may want to price a little more per window.