Displaying a tree of category dropdowns?

I’m trying to have multiple drop-down category forms with WordPress, potentially with using “wp_dropdown_categories” function, but if there is a plugin that would be awesome, too.

For example:

[Car make] (parent category)

[car model] (sub category)

[car color] (sub sub category)

[go button to pull up posts]

Just a normal “wp_dropdown_categories” would work, but we have a ton of categories and sub categories, so that’s a pain. The only solutions I can find on the web right now are by using separate IDs, but we have a LOT of categories and I dont see how that makes sense?

ANY help is greatly appreciated!