I have seen this happen in my business and others in the same boat as me. I am in the process of getting a route built and the small dedicated truck to run it. You are correct in this case the 2 workers could go out and do the work in their own rig set up for mowing while you used a smaller truck. They could finish the route in about the same time and would have all the tools and equipment they needed and the owner could be clean and presentable to talk business with new customers. I am looking forward to that day!
Knowledge is knowing a tomato is a fruit, wisdom is not using it in a fruit salad.