Well we've done a 3rd room - it's on our second floor, called appropriately "The Top Room", and it seems to be a great success. I think our guests like being on the 2nd floor, it's even more peaceful than the others, and still has the lovely view!
It has certainly meant more work, but I hope that it is going to be worthwhile. It's great that the whole house is being used, loved and cared for!!
Let's hope this is continues to be popular!!