IMO I think you might have difficulty renting a home for a few days only. This is the busy time of the year for holidays and most bookings are for a minimum of two weeks.
We've stayed in both Ard na Mara and Radharc na Mara holiday homes. Would recommend either, located beside eachother and no more than a 5 minute walk into Dingle.
The booking company we used on both occasions is , we've always found them very good. Pity you're only booking now as they do have a summer sale in feb or march and you can pick up rental for half price during the sale.