Jane - this build was different style and it was the 2 of them mostly and waaay smaller than your vision but in the read she said she could have done alone but the fun factor would be missing.
I went to school with a gal who built her own cabin - totally by herself - in the 70's. It took her some time but she was an independant soul and determined as could be. I think it was dang near a 2 year build but in MN that means maybe an actual year of working time. lol As best I recall it was about 30' x 28' - not quite a cube I known. Single story with loft. Nice, Sadly a fire took it down in the early 90's when it burned up a chunk of the BWCA area. Guess you or an old fa^t like me can do it alone if we have the time and energy as others have. But ------


http://www.alaskaantlerworks.com/Alaska_cabin.htm