Some lenders require these days a foundation designed by a licensed architect/engineer; it was here barndos saved the money to attract buyers.
If you don't need clear spans, then the metal frame design is overkill $$$$.
Mueller is top dog but Morton might do more for less and offer metal exteriors.
Many barndo designs begin to morph into stick & brick built these days due to $$$$, lifestyle tailoring .etc.
Gotta draw since me got no grammar MasterArch '76