How expensive was it to own a cheap Porsche 911 (996) Turbo? Total Cost of Ownership [TCO]

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I owned a 'cheap' Porsche 911 Turbo for almost 3 years. How much did it cost to own?
If you want to skip all my blabbering about why and how I bought the car, go directly to 09:36 for (my blabbering about) the costs.
All the costs are in CHF. 1 CHF ~ 1 USD
Spoiler: It was 51 ct / km, which is pretty decent for a sports car of the caliber of a Porsche 911 Turbo. I was pretty lucky in that I did not have many issues with the car.
I was quite amazed when I realized that the Porsche 996 Turbo had fallen within my budget.
Here’s how much it cost me to own my Porsche 996 Turbo for 3 years:
I bought a 2001 Porsche 911 Turbo with 151’000km in November 2014 for CHF 30'000.-
NoS original 996 Turbo winter rims, a new set of Pirelli W240 snow tires and some center caps (off of ebay) for a total of CHF 2043.-
Bridgestone Potenza S-02A CHF 1067.- fitted.
Service CHF 3’207.-
Infotainment upgrade (Pioneer AVIC-F77DAB) CHF 1’549.- installed.
Reservoir for the hydraulics CHF 444.-
New Battery 199.-
Wheel change CHF 125.-
Wheel change CHF 125.-
Number plate LED CHF 23.-
Trunk/Hood-LED CHF 10.-
Service CHF 2’349.-
Fuel CHF 6’908.- (4'406l with an average of 11.92l/100km at 1 Franc 57 per liter, 36'977 km)
Insurance was 4’027 Francs
Taxes were 150 Francs.
But no calculation of total cost of ownership would be complete without taking into account the resale of the car:
The car sold for CHF 33’000.-
That leaves us with a total cost of ownership of CHF 19’227.-
That is CHF 6’786 per year and 51 cents per Kilometer.
Not bad, right? 51ct/km for a Porsche 911 Turbo! I reckon this might be the cheapest car I've ever owned.