Tyres for new cars

Good evening together, I would like to hear from you how you handled the following situation in the past: I ordered a new car, will of course be delivered on summer tires. Now I can order the car on standard rims at no extra charge (17 inch) , which of course do not look so great or at an extra charge of 500€ chic 18 inch. However, I always ride 8 compartments tires and change myself. Now I thought about two variants: Order 18 inch from factory and for the win bzw is this even cheaper than aluminium? Or just use the standard rims for the winter and for the summer chic accessories rims. Has the disadvantage that one would be bound by the delivered summer tires to 17 inch. How did you solve this in the past?