You certainly could do it. You just need the camera, video transmitter, and a power source on the M3. Then a video receiver and screen of your choice at your ground station. Go for it!
You are lucky that DJI must still have A3S stock in Texas. If it needed to come from stock out of the country, DJI would be willing, but US customs, not so much.
My UPS delivery also made it today. Nothing as fun as an A3S though!
UPS delivered my drone Monday although when I looked Sunday night it said delivery on Tuesday. Most importantly I have it.
It is a new Air 3s. I am most grateful to DJI for the warranty service that cost me $0.00. It is rare for companies these...