wrote

That leaves the airframe at $145k.

Composite airframes are just as expensive.

What are you going to build an airframe out of that significantly reduces
that cost, Chinese rice paper?

Lapin is a babbling idiot.

I wouldn't go that far - he just seems very naive and inexperienced.

There's nothing wrong with dreaming about an aircraft that will use
yet-to-be-invented structural materials, a yet-to-be-invented power source,
yet-to-be-invented controls, yet-to-be-invented lift devices, and
yet-to-be-invented avionics. What seems silly and quite pointless is
arguing about what may or may not be possible 100 years from now and what it
might cost.