I have found on the web an old picture that shows the manor one century ago. It was obviously used as a farm by then, but not much seems to have changed in the buildings.
(Source information : this image comes from the official tourism site Infobretagne.com and has been reproduced in many blogs. It was initially part of a postcard published in the 1920's by the Imprimerie Poulneau in Port-Blanc, which has disappeared many decades ago. As far as I have been able to find out, this image is now free from any copyright.)