Any advice? Model?? Price??
I do have some recommendation about the different models.
The basic Dryer Buddy I would not recommend. It's straight splitter, and there is nothing preventing you from accidentally running both and overloading and tripping the breaker.
The Dryer Buddy Plus adds a toggle lockout, where you have to switch which side is active. That's pretty decent, but may be a little inconvenient to have to go switch it with the button, and you may forget and then the car doesn't charge, etc.
If you're going to buy one, I would just recommend getting the really good one, because it's not that much more, but is way more convenient. It's the Dryer Buddy Plus Auto. The "Auto" part is that it does the automatic toggling for you. When the dryer runs, it will lock out the car charging side, and then when it shuts off, it will re-enable the car charging side. So you never have to mess with it or remember to flip it back to the other one.
One more thing to consider is that the whole point of the Dryer Buddy is to avoid unplugging stuff. When you're running the cord through a door, you inherently only want that cord there when it's in use. Kinda defeats the purpose of the Dryer Buddy.
Well yes. I would think the idea is to not have to reach behind the dryer often. He could leave things plugged in, but pull the cord inside the door to shut it.