My
Bunnings Ozito variable speed high torque, reversible, corded drill is absolutely perfect. Even doing a 15 minute crush it doesn't raise a sweat. Mine's about six years old now and the price has held well, mine was about $95 back then. If powering mill with a drill, a couple of points:
Don't get a cheapie cordless. I remember at Bradsbrew's brew day once and it was blowing blue smoke just on a Marga

Then he went out to the ute and came back with da industrial strength mofo and it was fine.
Always get a keyed chuck. Keyless chucks have a habit of suddenly spinning, don't want to chew up your virginal mini mill shaft.