I went one step ahead by making it a battery operated mixer. Just hooked it up to your car's cigarette lighter.
In conclusion, there is so much to do with the recycled materials lying around and ready to be put to used. I found it enjoyable and worth building things from scratch. Everyday that I see things around, I knew I have something to put it to used. It's just a matter of time or if I can pass it around. Going over with the expense of my project. I would say I spent a lot, too.
Expenses rundown:
Metal drum - free
Bike crank set - free
Steel bracket - free from bed frame
Set of rubber wheels - free from discarded travel suitcase
Nuts and Bolts - a couple of bucks
Geared motor- a buck
Labor - priceless