That is the most retarded thing I have ever heard. You are saying someone making $100k/yr salary, should buy a $100k car, and put 30% down? :picard::picard::picard::picard::picard:
Perhaps it is a smart idea when you are making shit for money, but still, that is a retarded idea. Why would you plan spending on GROSS anyway?
This thread has lots of :picard:
-edit- I know you said “your rule of thumb” and not “everyone” but still… :picard: