Hi i am new to the garage journal. I am going to build a new 30 by 40 by 12 pole barn this spring, and i am having a tough time making a decision on a couple of things. First of all the overhead door size. I plan on putting two 10 by 10 or 12 by 10 doors on the gable end and just don't know whether its worth the extra money for the 12 foot wide doors and whether there going to need commercial door openers. Secondly to save some money on concrete costs should i prep the site myself and just have someone come in and pour it and do the flatwork. Or if anybody else from Michigan has any referrals to do the concrete work. I live about 20 miles east of lansing.