I have no interest in cars and from my perspective your market would be quite niche as you need customers who can actually tell it is a replica. I go to craft markets a lot and would not pay more than $15 for a wooden car that size.
I also craft and keep thinking I would love to get paid for it but when I do the math (materials + time - reasonable sell price) I am always much better off in my day job!
Possibly setting up a stall at Show n Shines with samples and taking custom orders could work - if no one is doing this already. I'd say the people at those would be your ideal customers (car mad and appreciate old fashioned craftsmanship).