its so tempting to blow this money /rant

[Marlin]

One of the main drawbacks of mounting a compressed air tank, in an out of the way place, is the fact that compressed air has moisture in it, LOTS of moisture.
There SHOULD be a drain petcock located on the bottom of any compressed air tank for draining out the water that accumulates on the inside as condensation, which would be somewhat difficult to access, if mounted in a hidden loca.
Otherwise it will eventually rust through...
That's why many aftermarket sources of compressed gasses are CO2.
I personally like a 50 cf scuba bottle, since I can press it into service in another hobby...scuba air has VERY little moisture in it.
But I will say, carrying around a miniature , pressurized to 3000 psi in the back of your ride, is NOT an option that everyone should entertain.
Don't tailgate the dub, it's comin' your way...

I am with LDUB, I got a 10lb CO2 rig with hose and chuck for less than 200, it will fit behind the seat on the floor, and it can still reach all 4 tires. It can air up about 40 35" tires from empty to full on one tank and run some small air tools. Way better than air, and CO2 does have a lot less moisture which means less corrosion on your wheels...