Shop around. I just got a quote for a 30x50 (14’ tall) metal barn installed with 12’ doors on both ends and a walk in door on the side for just under $20K. No insulation, and I have to do the site prep, but this company has made two other buildings for me and I have been very pleased with the product. With gravel, I anticipate $24K total, and will put in a small solar system for lights and keeping implement batteries good. The other nice part is that when it goes up, it will be finished in two days.
I also just priced some new tractors—John Deere is at $34K for a new 2022 5045e (MFWD with loader) and $50K for a new 2022 model 5055e but with a cab. Those are some steep discounts off MSRP, plus I am getting more than I paid for my 3025e should I decided to make the trade. However, I can only do one of the above (the tractor or the barn), so I am leaning toward the barn.