Hi Kevin,
Can’t you just ad a script into Autostock that creates automaticly a default page for the car inventory and a default page for the single car vieuw during the installation of the plugin?
Because not anyone can work good with wordpress or any kind of ICT, so it will be easier for persons to use youre Autostock.
As example Woocommerce, it creates his own shop page, check out page, account page,…