Wow this is a stunning spot and possibly the best airbnb I've stayed in. We stayed for almost a week and could have easily done two! The setting is incredible and the house has been beautifully decorated in a very homely way. It meant our stay felt like we were staying at a family holiday house than a rented spot.
There is plenty to do, Hanmer and Kaikoura are both easily accessible and the adventure park just up the hill offers great walks and activities for all appetites.
As a host Emily couldn't have done more to help. We landed on Christmas day and she went out of her way to make sure we had supplies in. Excellent service that didn't go unnoticed.
Copper Cabin gets my highest recommendation. Just book it already!

Ps. Make sure you try the outdoor baths... a bit of a mission with filling and getting the temp right, but when you do it's the most epic way to take in the sunset!