I built a 24 x 32 last year 10ft wall height. It is an actual barn with 3 sliding barn doors and 1 garage door. I think I did it for like 6k. That is all materials. I did all the labor myself. I bought my metal from the Amish. Saved me $1000-1500. No warranty on metal of course, but I’ve not heard anything good about any of the warranties.