My grain mill is currently under construction. Rollers knurled, main frame built, still lots of the parts need final machining and assembly. With my tools and machines in the garage and freezing temperatures here, I'll be waiting at least few weeks to continue on the project. Anyhow, I plan to use a motor I pulled from a food processor. Probably in the 1/3-1/2HP range, it's a decent speed (not 1100/1700rpm), has a built in on/off/pulse switch and power cord etc... I think the $60-$80 food processor was on sale for $29. Thankfully it jammed on us a few weeks after we bought it, the main worm gear was completely stripped, so I salvaged the motor without ever knowing what I'd use it for. Thanks to Chinese manufacturing, you may be able to find a suitable motor fully equipped for less or a comparable price to buying one from a surplus center or ebay, etc..