30 x 40 x 10 build and cost

In 1993 I bought my 30x40x12 pole building as a kit from 81 Lumber for $6500. That was a walk in door and a 10' sliding door, all metal siding and roof included. Did it all myself with the wife except had to hire some help to set the trusses and had the floor poured. Best thing I did was put white metal roofing on the trusses for the ceiling. Probably have $10000 in it total. I think right now just the building itself from Menards is $20000.