I think a lot depends on the climate as to where the scale is located. I have been hauling grain to elevators, feedlots, chicken farms, etc. in southwest Idaho for more than 40 years, and I have never encountered a covered scale. Many of the scale houses where I have hauled to include offices, break rooms, rest rooms and meeting rooms. So to me, the scale house looks very appropriate in size.
However, I would move the scale house (and the scale) further from the unloading area so the empty trucks can drive onto the scale without getting in the way of the trucks waiting to be unloaded. The way Walthers is showing it could create a real bottleneck.
Carter