Ohh I know what it will take, but thank you for the warning anyways.
My ongoing project a -73 Eldorado convertible was one of those 3 x the budget cars, the problem was the interior, I ended up importing a low milage HT for parts so the interior on that one did cost my 5000 USD give or take a little, but I got a 98% perfect orignal interior..
On the rust bucket it is a different story where you actually can put together a new car from repro parts.