I live in an area about 20 minutes drive from the K club and I had been thinking about renting my house for the ryder cup, especially when there are several top class golf clubs 30 minutes or less from my house. However I've been checking the multitude of websites handling rentals and am convinced that this ship has sailed. A look at any of them will show that there are a lot of houses available in Kill, Celbridge, Maynooth all much closer than many of the other houses available. If they haven't been snapped up yet then thats it, most people have had their tickets for well over a year and will have booked their accomodation by now. Additionally there are a lot of new hotels within 30 minutes of the K club who are all organising transport and even if they doubled/trebled their rooms rates that'd still be less than house rental prices. I'm not saying that some lucky sods haven't made a killing but that there aren't any victims left. A friend of mine lives only 10 minutes from the K club and if there was a demand for houses I would have expected leafleting of his area notifying people in a similiar manner to those leaflets from auctioneers saying that they are looking for houses in your area.
How many people are going to attend the ryder cup anyway I think the course can only handle about 30,000 per day. Remember this is a small event in terms of what can be seen, 4 matches in the morning and afternoon on Friday and Saturday and 14(12?) on Sunday. If it was you, would you rather stay in a Dublin city centre hotel with transport to and from the event organised and everything on your doorstep for the rest of the week. The Fitzwilliam hotel on the green can be booked today for the ryder cup week for 100 euro per person per day.
I think at this stage it is a ripoff where the rental companies are trying to squeeze every last 80 euro they can out of this event.