EBH practicality in Southeastern USA.

I've searched the posts and apologize if this is redundant, but I'm looking for advice on the EBH. I'm originally from Pennsylvania and definitely can see the advanges for having one, at lease in the winter. I also spent 8 weeks in Rochester. Minn., and was definiteley aware if it's value there. We now live in the Metro Atlanta, Ga. area. Our 2 car garage is attached to the house and insulated although not heated.
-------High/Low
Winter 50 29
Summer 88 67
Record 102 -10
This is according to the weather channel. However, temperatures have been running consistantly above averages lately.
The questions are: Given our temperatures, would the hassle of plugging and unplugging the EHB be worth the benefits. Is it the worth it even in the warmer zones just for reducing engine wear on cold start-ups. Or would it be sufficient to use it only when temperatures are expected to drop below a certain value. The reason I ask is that, because of our hilly topography, I'm sure the ICE will kick in shortly after leaving the garage even with an EBH. It will probably use a good % of the battery just to get up and out of the driveway and it's uphill for the next mile. It's not the cost. It's going to be my wife's car and I'm really concerned about the discipline involved in remembering to plug and unplug. We're also senior citizens, and for those that can identify, the first thing on our mind, after pulling into the garage, is probably not going to be the EHB.
Thanking everyine in advance for any enlightenment in this area.

 

Thanks for the input. The "forgetting to unplug" is my concern, although there are probalby ways to make it more difficult to forget. The other problem is my wife's start time varies all over the A.M. I'm just trying to be honest with myself. If it's not a really must do in my own mind, I'll probably, consciously or unconsciously, forget to plug it in and set the timer. And, if it's not a daily habit, well it may get forgotten. There's always the old method, back in the days of carburetors and chokes, of just taking a few minutes to let it warm up before driving off and putting a load on the engine. I'm talking warm weather option, not cold weather, say over 50 degrees. You'd sacrafice a little gas mileage, but if it saves on wear and tear of the engine I can live with that. However, with an all synthetic motor oil, I wonder if this is even necessay. Oh well! Decisions, decisions, they make life interesting.

Thanking everyone for the input.