You could do it much cheaper depending on you definition of “car”. Custom designed and built monocoque? Very expensive. Glorified kit car? Much easier!
Tube frame chassis are easy to build by hand with a few jigs.
Use other OEMs suspension, engines, transmissions.
Register each car separately as low volume rather than attempt type approval
You could do it much cheaper depending on you definition of “car”. Custom designed and built monocoque? Very expensive. Glorified kit car? Much easier!
These guys build road legal cars and sell them to the general public https://www.mksportscars.com/
They definitely did not start with hundreds of millions of seed capital.