Any Electricians out there? Air comp. question

I believe in the KISS method also. I found Champions wiring guide online. They figure 30 amp breaker and 8 gauge 70 degree C copper wire.
What do you guys think of using a 30 amp plug like I have on my welder? This way I could unplug one and plug in the other. This would save me running another 230 volt 30 amp circuit.
Thanks Mike