Maintenance and purchase advice Cayenne

Hello together I’ve been driving an Audi S4 4.2 V8 Avant for some time now, so I’m used to the “pharmacist prices” around the car. Now I’m looking a little towards Porsche Cayenne, because there are the used at reasonable prices. Now my basic question. I can afford the 2 Audis more or less easily, maintenance etc. are no problem. Is that different with a Cayenne? Porsche was for me always on a level with Lamborghini, if you don’t have 200k€ in the Yes It’s best not to think about it for you. Is that so? I’m really satisfied with my Audi, but it’s a bit small for me. So I’m just looking around. But somehow I’m afraid of the costs. Right? Also: What to look for when buying a Cayenne? Known weaknesses? Buy S or Turbo?