The Boat Hotel 4* , Boat of Garten, Scotland. $15/night single room with breakfast.
Available october, november and december'15 (until 24th december I think).
Single room with breakfast, non refundable on booking.com, refundable at $30 also on other booking sites like venere.com.
Good reviews on TA.
http://www.booking.com/hotel/gb/boat...07&#map_closed