Moving to Alaska - Engine Heaters

I think a good high temp silicone work work fine.
Depending on where you/your Tacoma will be living lots of places have dedicated outlets for apartments and such maybe even some with timers which would be best.
That said with Anchorage’s temps maybe 30mins to an hr should be good for pre heating to start up.
When I was wintering up in the interior off the grid. Starting the HiLux was a real process. Depending on temps and of course before I borrowed a generator for the winter, it was either slide the Coleman under the truck or a weed burner and a piece of stovepipe requiring constant monitoring, after generator using a torpedo heater and a tarp, and the block heater worked great, and less monitoring. Warmer mornings it was just use the block heater- start it up about 2-3 hrs before you wanted to leave and go back to bed , eat breakfast etc...