I have two pole barns. My car shop is a 36x56x24 that I had the Amish build the shell. This was built 23 years ago. I poured the concrete, installed the water, electric, insulation, the second floor and finished the walls. At the time, the shell was $13k and very nice quality. The lumber and metal came from Kiem Lumber. I can’t remember the crew that built it, but they where done in 4 days.
Many years later, I built a 30x40X24 agricultural barn. Interesting that the kit was $15k from 64 Metals from Saint Louisville. It was a good quality kit and the company has rebrand themselves as Lifespan Building Systems. They provide a class on pole building or they can help you find a contractor to do it for you. I built my with my dad and some friends. I used it for livestock and planning to repurpose it next year.