This is a guy I used for a few things. He has not done anything like a pole barn for me, but it might be a decent place to start. I looked at his references before I used him and thought they were well done. He did a new roof over a flat roof on my cottage and I was very impressed, the flat roof was very out of whack and he had to do every rafter/joist by hand and it turned out very well. His name is David Proctor, his number is 231-750-2621. I live in GR, but I think he works out of Sparta. I hate picking names out of the phone book for this sort of thing myself. Good luck.