Ron you might want to check out Tillers. I believe they offer classes in MN. Their website is www.wmich.edu/tillers/home/index.htm I took one of their week long classes this spring and really enjoyed myself. I found Tillers to be an exceptional value as the class (1 week ) was under $400.00. All the staff was very helpful and knowledgeable. We had an Designer, an Architect, Michigan Barn Historian as well many volunteers that had many years of experience to draw from. If I had the time and could convince my Wife to let me I would be taking their Fall building class. My best advise to you is Ask the local Timber Frame Builder if there are any near you. Then go take a class and enjoy!