Buy 718 with Sixt-Vario

Hello municipality, I am a Porsche newcomer and plan the purchase of a Boxster 718. My desired configuration is quite economical – list almost 60t€. I now consider ordering the vehicle via Sixt Variofunding. I would fix the runtime to 4 years; the mileage will probably not exceed 10tkm p.a.. The monthly rate would be about 625,-, about 30k€ on the 4 years. If I look at today about 4 years old vehicles (987), I still have to buy 40t€ The remaining value of Sixt would be just over 30t€. Personally, I think this is a good business. How do you see it? Are there experiences with Sixt in the Porsche area? Greeting Mike