I created a custom post type named cars and I am trying to find a way to display the posts in my admin menu where it will group the posts based off either taxonomy or postmeta by car manufacturers, then displaying each post (or car make) with that taxonomy or postmeta under it.

Like this:

- BMW (either taxonomy group or postmeta)
-- X1 (post)
-- X2 (post)
-- X3 (post)
-- X4 (post)
-- X5 (post)
-- X6 (post)

- Ford (either taxonomy group or postmeta)
-- Escape (post)
-- Mustang (post)
-- Explorer (post)
-- GT40 (post)
-- Focus (post)

- Pontiac (either taxonomy group or postmeta)
-- Grand Am (post)
-- Trans Am (post)
-- Sunfire (post)
-- Aztec (post)
-- Bonneville (post)

I'd like to try and make so that it's easier to manage post (car models) by grouping them by their manufactures, versus having a running list of a cars.

Any thoughts or direction to start would be much appreciated.