I posted a similar reply to this question elsewhere recently...
Given that most of the prep work was already done, as my car's body was used to create a splash mould, my car was then painted by the painter at a local boat yard. Took a week in total, and cost such a relatively small amount that I don't recall what it was. The costs you are quoting are on a different planet to mine.
Good luck!
Here it is in the paint booth at the boat builder's...
More pics in one of my albums.
Cheers,
Glen