I just got done doing the same type of project. I ran 2-2-2-4 and let me tell you it might have fit through 1-1/4" but I wouldnt want to pull it. I ran 2 inch and it was still a pain in the a**. I did have four 90's though.
I just had a longtime freind put up my 30x40x10 metal pole building. His work is amazing and his prices are more than fair. Im in the Canton area so if anyone is interested let me know!
I just had a metal pole barn with concrete perma-columns. Scissor trusses so I can have a 12ft door on a building with 10ft walls.Concrete ,building,and doors im just under 20k.