Deteriorating 20′ x 34′ log home Montana circa 1900-1940, no interior walls, rock foundation and not straight anymore. One rotten log on the bottom. We would like to move it to a concrete foundation. The roof needs to be replaced (we can do). The cabin has a lot of sentimental value. Have digital photos. Can you recommend anyone? How can one log on the very bottom be replaced as easily as possible? Easier to dissemble the cabin? Cost EXCLUDING roof and foundation?