Very good idea (and needed, I don't know why ^^)
Maybe can you add a plastic door frame (instead of chrome),
A more basic interior without so many options and without central screen (or a small liquid crystal screen like 90s/2000s cars),
Replace all chrome parts by plastics ones,
More basics and cheap bumpers and mirrors,
Plastics door handles,
Replace small side windows by a plastic/metal cache,
Cheaper exhaust type, cheaper headlight and rear light without led and sidelight (can be replaced by halogen),
Add basic hubcaps for base trim (and keep visible steel wheels for business trim.
A Tograc version would be nice too!
I know, it can take a lot of work and time to release, but it's only a suggestions ^^