I have been thinking about trying this for many months.... Well, this past Friday a work buddy and I hit the local Harbor Freight store. I was not planning to buy a concrete mixer, but they were half price at $100 for a 1.25cy electric mixer.
I came home with this...........
The picture compares my old Thumblers Tumbler 15# barrel to the mixer.
Edited to correct... The mixer size is not 1.25cy (cubic yards), it is 1.25cf (cubic feet).