I did this with a spare 80 gal tank on an old industrial 80gal 240v compressor/tank. The 2nd tank is in an outbuilding, and definitely helped run tools more consistently. It's not an ideal setup, but the tubing out to the building wasn't buried deep enough in the ground and my theory is that any moisture in the line would freeze and severely restrict the line in the winter causing issues with running tools due to inadequate CFM.

Got the 80 gal tank cheap enough, plumbed it through the top where the compressor would have fed it, used its normal outlet, and it works great because tool use is intermittent and the pauses between demands give the tank time to refill at a leisurely pace. It hasn't placed any perceivable burden on the compressor and fills pretty quickly, all things considered (especially in warm weather when line restriction isn't an issue). Pressure does drop slightly lower before it starts refilling for whatever reason like DRAGULA said, but not enough to matter.