Personally I'd not buy any car and after "one week" take it for a 2.5k km trip. I'd prefer to make sure not to have any unwanted surprise.
If you have it serviced in CH, with an hourly cost of labor of 175 chf, yes, it will be expensive.
Spare parts are not more expensive than Porsche or BMW.
Intervals are:
First Service: 1000 miles (1500km) or 3 months after delivery (which ever comes 1 st)
Second Service: 10,000 miles (16,000km) or 12 months after delivery (which ever comes 1 st)
Third Service: 20,000 miles (32,000km) or 24 months after delivery (which ever comes 1 st)
...
