A large SUV is not cheap by most standards. By comparing the cost against a custom hand built unit it is dirt cheap. Don’t forget to add R&D, design, tooling etc. to your cost accounting.
Condider the production of a crystal to control a cheap $2 watch! High precision, ppb, to maintain accurate time. It’s not done manually!
If a item is not amenable to mass production it is usually a matter of design, materials, or a fundamental matter of science.
Ah so. I understand the Russians put in a lot of effort to develop a big banner display for parades etc.
And what is the basic science of an electron cloud display?