We’re repurposing abc.com, which currently hosts a used-car inventory plus 300+ product, blog, and service pages. The new plan is to use abc.com as the main brand site and add two separate service sections:
abc.com/european-auto-repair/ (with its own services, brands, and location pages)
abc.com/collision-repair/ (with its own services, brands, and location pages)
Is this a good site architecture for SEO?
Also, what should we do with the old inventory, blog, and service pages? Should the car-inventory content be moved to something like inventory.abc.com, and can we 301 redirect the old URLs to pass authority to the new structure?