The first time I ever did bubblehash was with those. 
I helped a friend who didn’t know what he was doing so I didn’t either 
& we used a stout electric drill with a paint-mixer attachment. Recommended was a wooden paddle.
Stirring that much mat’l & ice is a bear of a job & you’ve got a lot of work there so better get your friend ‘Ogre’ to do that one. 
The other thing to consider is draining/pouring/etc.; A full drum weighs A LOT so don’t plan on carrying it around. heheh
just had the idea to use the ocean to do it for you…hmmm… 
or even a cold mountain river!
