Very nice. Yes, $500 is more than I want to spend. I was really just looking for some user experience. Maybe others out there had bought an entry level mill like I'm planning on and found it too small for 10-20 lb batches. I think I will try to upsize to the Monster Mill 2 if morebeer hasn't shipped yet. Thanks for your input.
But such a mill is NOT too small for 10-20 pound batches. There are two things that define size in this regard: capacity of the hopper, and speed of the crush. Both can be controlled, by the speed of the motor and the size of the hopper.
So how large a hopper do you want/need, and what speed of crushing is important to you? You're throwing out an unclear set of criteria here. Lots of people use the Cereal Killer to great effect. IMO, it (or similar) is the best budget-conscious choice, gets you speed and capacity without breaking the bank.
I used a Cereal Killer equivalent for a bunch of batches, all of which were 5 gallon batches. The hopper was something like 7 pound capacity, so I had to add grain to it as it emptied. Could I have fashioned an extension to allow for more grain? Sure. You could even do something like get a plastic water bottle like they use in the stores for people to buy water and bring it home, cut off the bottom, invert it over the hopper, and pour your grain in that to feed the hopper. Or you could buy some aluminum or galvanized sheeting and make a hopper extension. Or, with some models, you can buy a hopper extension.
And you can speed up or slow down the motor. Regardless, unless you're looking for something with the speed of mine, it's going to take 5-8 minutes or so to crush that grain.
I ended buying and making mine as shown above because I've been doing low-oxygen brewing and one of the tenets of that is to crush the grain as close to dough-in as is possible, so the grain flavors aren't oxidizing before they hit the (deoxygenated) strike water.
Did I have to spend $500 to do this? Well, it's certainly nice, and convenient, and helps me do the LODO stuff, but you don't need such a setup to do 10-20 pound batches.
And there's no way I would have spent that were it not for the LODO considerations. I have a low-RPM motor (that's supposed to reduce oxidation) at 200rpm, and even at that low speed, I'm 2 minutes.
Unless your requirements aren't being specified here, a Cereal Killer is more than enough for batches using 10-20 pounds of grain.