Just to be contrary!, I can't see reducing my budget by 10% from the gitgo for an accessory that can be added later. Not everyone would like to take on an early morning, out in the elements, obligation. Now, if you have one of those little houses away from the house where you take the Truman quick step, then it might be a consideration. However, speaking for myself, some of us old fogies wouldn't be interested.
JMO
George