Stinger GT / trailer coupling as well as oil exchange interval and inspection costs

Hello everybody, I have a car change in the fleet again in a few weeks. It will become a commercial leasing again at 36 or 48 months with 45 TKM p.a.. A Sorento UM Platinum goes back after 3 years (absolutely trouble-free time) from the leasing. The Stinger GT would be a possible successor. Actually nonsense, because I also have a new Camaro Cabrio 6.2 in the fleet and the cars m. E. “too close together”. Therefore normally a fun-aut o and an SUV as a KM eater. Anyway…. Now to my question. The Stinger GT must m. W. all 10 TKM for oil change as well as all 30 TKM for inspection. Do you have approximate numbers / costs at hand for the current oil change dates? Is there the possibility, as a commercial customer, to acquire both the oil change intervals as well as the inspections via a flat rate? Finally a question about the trailer coupling. Will this be mounted; like at Sorento; after embarkation at the destination port or e Are there some users here with the AHK and possibly photos of it? I thank you in advance for the support. PS: Brief to the info. Alternatively 2 SUV (GC SRT or Explorer Hybrid) are available again. Best regards, Filou