Hey, Frank S, metric_taper;
you guys should check out homemadetools.net. People there lap this kind of thinking like big bowls of lime sherbet.
Ohh, wait a minute....
Like Iowa, our soils can be poor support to concrete pours. The perimeter of my building is unpaved, floor is acceptable, but really want [need] 4' under my DeVlieg. That's about 18 yards. There also is a walkway/ forklift ramp needing rebuilt.
While getting a personal batch plant is thinking big, there are potential customers afterward. I see them likely completely unaware there a truck shop and machining facility of considerable size connected to it. A safe bet is 10-or 15 miles is 1/3 or 1/4 the possible customer radius. One then feeds the other.
That's basis of my intent, instead of concrete I'll rent hard to find tools. Very low cost, high deposit, and agreement guarantees they have NO liability protection. Two pages of 8.5" x 14" legal boiler-plate un-needed, a simple "Receipt of this warrants user has no recourse to injury or property damage, public or private."
.......but then "Shall not be infringed" is unclear to some, and over past several decades.