For the record my heating pad draws 55 watts. According to the Interweb pads draw 40 to 60 watts,

Dialing in the temp and time is easy - just experiment. Note that some pads have auto shutoff usually 2 hours

Heat gun is too hot and draws too much juice (1500 watts =125 amps@ 12 volts)

I am using a Coleman Collapsible Cube Cooler model 2000013291. This is it at Canadian Tire
https://www.canadiantire.ca/en/pdp/coleman-cube-collapsible-soft-cooler-50-can-0853685p.html
I paid $19...

I have to agree about the whole wife relationship point. My wife wouldn't want some dirtbag cheapo set up. However I'm cheap and it was just for me so no biggy.

As far as melting boots and car...

[QUOTE=MagnificentUnicorn;6737726]I’ve thought about this. You could just get a nice insulated soft cooler and put your warm boots in it
/QUOTE]
I have been using a 50 can soft cooler and heating...