Myself & my brother have Muller buildings. Mine custom designed, my brothers is a standard design. Both meet the wind loading for the Houston TeXas area @ 110 MPH winds.
We both are happy with Muller. You can also have the building designed to allow for a gantry crane. So, how strong do you want it?
Its easy to add wood to the steel also. im curently putting in plywood walls on the parimiter walls. I use the same metal screws that holds the steel siding on, & 2bys for the joints.
But I do have some tellephone poles that I may build a pole barn for my lawn stuff.
I work part time at a farm installing 8 old windmills. They have very large building , both red iron & pole built. They held up through the Gulf Coast Storms.
So, I say you will be happy either way you decide to go.