Restoring a favourite

I want to restore and modify a little my old favourite car the BMW 635CSI. I want to make a youtube series of it, how I restore/modify it and film all the progress that goes with it. The finished car should look the same or even better, when it came out of the assembly line in the 80's.

Firstly I need to get a car as funny as that sounds, but yes I need a car and that already costs around 7000 euros. Then I will be taking the car apart to its bare shell, repair the rust(if it has some), refurbish the interior, modify the engine a little bit and clean that up as well and finally to the paint job, which could cost a lot of money, but we'll see.