I had a small 26x40x10 built, with 2 grarage doors and a 3 foot side door. 5/8 on the roof and 1/2 on the side. I paid 750 at the time to have it leveled and filled, paid 40 dollars for a guy to compact the fill with a 30T roller, and paid 300 for gravel. I bought windows myself, really big double hung ones with grills for 80 dollars each and had the builder install them. All together, including a concrete floor with a drain hole and stubs put int the poor for my elec lines, I paid about 14,400. I could have gotten two other builders to build it cheaper, but they used 1/2 inch on the roof and used 4x4's instead of 4x6's. With the snow we get here, it wasn't worth it. oh, and the vinyl siding and roof shingles match our house exactly.
On a side note I finished the interior for about 700, using 7/16 osb, and every last piece of insulation I could get my hands on. On the ceiling I used 1" rigid foam panels, 3' rigid foam panels that were cut in chunks by some moron (free) and r13bats. It isn't as energy efficient as it could be, but I feel very warm when I walk in there in the winter. I bought some bury grade wire and wired it up cheap. No running water though. Heated by propane, kerosene, the sun, and maybe this year a wood stove.
I just bought a 3/4 hp garage door opener for the pole building so I don't have to get off the tractor and open the door. I paid 71 dollars for it at a place called ollies, it was supposed to be 80, which was a mistake, cause all the others were 159. I had a coupon too.
I volunteered to help someone remove their kitchen cabinets for free and now have cabinets across the back end of the pole building.
Hope something here helps. I live in central PA.