No. I'm giving that serious consideration for both the F150 and Mariner. The houses on my street (including mine) were built with a two outlet power socket between the garage doors AND a socket at the front end of the garage on each side. I suspect that was intended to power engine block heaters.
Good plan...they really are the answer to the cold problems and don’t cost a lot to buy and install. I suspect you can get one installed for less than $200. The cool thing is, when you start the engine you already have slightly warm air circulating - no frost on windshield. They are a lot better for engine life as well.
I used to have a Ford F-350 diesel with two engine heaters; one in the oil pan and one in the water jacket...that was really nice.
Stay warm and cheers from Salmon