I wonder if something like this would work https://www.harborfreight.com/20v-c...with-12v-dc-power-option-tool-only-64533.html
Guessing it would be okay if you’re just trying to dial in the pressure to a few pounds. Probably take forever if you’re trying to increase 10-20lbs. Seems affordable enough to at least try it? Worst case you put it in your car.
I got a hose, but I'd rather have a portable battery powered inflator, especially when doing trailer tires
I wonder how it would do on the steers? I have the glad hand one, but it only gets close to 120 on my steers. But I’m picky on those for some reason.