affording the car is the easy part, they have become so cheap,
You can pick up a clean example for around 250 to 320k
However.
Fuel is a major expense, she is extremely thirsty.
Tyres ect
Then, the gearbox, which is going to break will cost you like 120k
Then the motor, which you dont find second hand, but if you do, its also well over 50k, if not more
Then keep in mind that everything with an //M badge on it is tripple the price.
Maintanance on this thing is not cheap, but then, neither is that on the 550.
I would go do some extensive homework if I was you.
If you can afford the car as a garage queen, then you are going gto own the most epic vehicle ever created, if you buy this thing as a daily drive, you have too much money, and should just buy a F10