This makes no sense to my eye. It's like making a startup to make delivery vans or stretch limos. There isn't enough economy of scale. The economically effic

This makes no sense to my eye. It's like making a startup to make delivery vans or stretch limos. There isn't enough economy of scale. The economically efficient approach would be to do what the military and other manufacturers would do. What Boeing has been doing to the 737 for decades. Leverage an existing airframe, stretch it, re-engineer what's needed. Building a bespoke plane, a bespoke plane manufacturer, and all that goes with it is a tall order. Why not fly fed ex packages too? It's just not really specific, or big enough of a market, no?