My only debt is the mortgage. Since '95 the property value has almost doubled.
I agree, new car is a poor purchase, but they are fun! If I have the need for a new car, then I would use a Home equity line of credit to pay "cash" for it. The one gets to deduct the interest.
When you deal for the car, let the salesman think you intend to finance. He can then offer you a lower price based on what he gets for commision on the sale and finance. Then, we you get the price quote you want, drop the bomb and write him a check.
Not too fair, but what the heck.