Room in or near Edinburgh weekdays for me & my dog

I'm looking for a room to rent in Edinburgh, as I work in the city two to three days a week. The rest of the time, I return to my home in the Cairngorms. I work for a charity and I travel with my small dog, who’s well-behaved and used to being on the go. I'm easy-going and low-maintenance. In the summer, I’m usually out most evenings exploring the beach or the hills with the dog.