The main problem with crushing grain until it becomes a flour is that you'll probably get stuck sparges. It depends on your equipment and methods, but everyone is looking for some variation of having the grain split open so that the flour part gets trapped by the grain husks. The cheapest barley crushing mill is a corona mill. The more expensive ones are more convenient, but any will get you good effeciency if used properly.
On Tap: Barleywine, Coffee Oatmeal Imperial Stout (big big beer)
Fermenting: Double Simcoe IPA
On the Bench: Racer 5 IPA
"One of the first things early caveman did, when he crawled out of the mudd, was to make beer. And cavemen everywhere are still making beer...and drinking beer." - Jean Sheperd