Convenience of Short Load Concrete Delivery
You can just call and order as much or as little concrete as you need. The mobile concrete mixing truck shows up and starts making concrete as you need it. You are freed up from picking up the bags of concrete and probably a mixer too.
You don't have to call on family and friends to help you mix the concrete, haul the heavy bags of concrete and clean up. Consequently, you don't have the payback problem of owing them the favor of helping them with their projects.
When the concrete is poured and you have all you need, the machine simply stops making concrete. All the raw materials that weren't used, stay on the truck. You don't have to clean up the equipment or return unused concrete or bury excess concrete. There is no wasted concrete dumped at the job site. The truck just drives away.