Well observed. My experiences include a lot of farms that operated with big yards of scrap iron; were always repairing / rebuilding something, and did contract construction work to keep the machines running when they weren't using them for their own concerns.

There's very few operations running that way anymore, the "odd construction contract" market for them dried up before and faster than the farming side of those operations. USDA Soil Conservation flood control projects used to be a large source of work there.