It seems unlikely that small business owners and homeowners actually rented serious trucks to move these into place themselves (or made them on the spot) , I wo

It seems unlikely that small business owners and homeowners actually rented serious trucks to move these into place themselves (or made them on the spot) , I would expect with a little asking around you could find someone enterprising who picks up chunks of concrete (aka 'urbanite') and tosses them into molds with additional concrete and delivers them for a price.