Insurance is a funny one as there are a lot of variables but in most cases you will find a Porsche cheaper or similar to that of a Vauxhall corsa in some cases. Servicing is usually dependant in the manufacture, high end BMW excluding M are no more to service than say a 1 series
Is that because generally a Porsche won’t be used as the main car and not during work commutes etc so on the road less?
Part costs can be a lot more on higher end cars – even things like tyres.