You need to offer more details. Are the four sets of glass in the same hotel, if not where are they and how far apart are each location (5 miles or 200 miles apart), what time of day are they stipulating it must be done (any time or 03:00 in the morning).
If they're all in the same hotel, I'd be looking at somewhere around £200 - £250 for what you can see in the pic.