I can't comment on price, but spoke with SPs I saw last summer in London, UK about how hard overnighters are pushed over there. Seems a lot of guys are on the road and lonely. And the chat on the UK boards seemed to suggest a greater willingness by SPs and clients to see each other this way on first meeting. i don't think our escort culture here supports this as much.
No matter what you have to host. Your cost will go up over the rate as others have mentioned. The girl needs to be watered and fed. And the amount of sex is not going to fill the entire time. There will be sleeping. I wouldn't do this unless I really needed to soothe some loneliness. It's not a good use of time or money if the issue is about having sex. A two to three hour session with a bottle of wine suits me just fine.