Mainslea is in Dunure. It's a detached house, sleeps twelve, so it's a decent size for a group.
It has six bedrooms and four bathrooms, which helps with that many people. The house has a 4 Star rating. It's well equipped, not just basic.
The main thing about it is the view. It looks right out over the harbour and across to Arran. The Ayrshire Coastal Path goes past it, literally. You're yards from the beach.
The house is wheelchair accessible at the entrance and has some ground floor facilities. There is a games room, which is handy if the weather turns. It has a patio and garden. Parking is on site.
Dunure itself is small. There's a local pub about a quarter of a mile away. You'll need a car for a big shop, Ayr is the nearest town for that.
The area is good for walking right from the door. You can walk to Dunure Castle ruins, it's just there on the cliff. You might see seals. For a day out, Culzean Castle and its country park are close by. It's National Trust for Scotland. Golf at Turnberry is about a twenty minute drive. If you want to get the ferry over, the Isle of Arran is a good trip.
Facilities are pretty comprehensive: washing machine, dishwasher, wifi, TV, woodburning stove. Bedding and towels are included. You can bring up to two pets. There's a cot and highchair if needed.
Useful links for planning: National Trust for Scotland Culzean and Ayrshire Coastal Path.