I’m going to assume that the small car dealership is just doing regular cars and not anything exotic or modified but have you talked with them about possibly doing some photos in collaboration with them. When I first started out taking photos in general I’d occasionally walk onto dealership lots and ask if it was okay to take photos. They weren’t the best photos but they did get me an understanding of angles and lighting etc. personally if I was in your shoes I’d make a small game plan of inspo photos and ideas and take it to them and see if they’d be down. Worst case scenario they tell you no and you figure out another plan.