I have a Nutrimill (large and electric only) and a Family Grain Mill (electric or manual). If I were to recommend one, it’d be the FGM. Besides the versatility of manual or electric, it has many other uses than just fine flour grinding. For example, you can get a flaker and flake oats (one of those gluten iffy ones depending upon the source) rye and other appropriate grains. You can also adjust the grinding coarsness with more flexibility, giving you grits, and cracked grains for cereals. It’s easy as pie to clean, too. You don’t want to grind a gluten grain before a non-gluten grain without cleaning. I have a similar issue come Passover; I have to give it a thorough cleaning so as to avoid the mixing of the wrong types of grain.
I use my FGM almost daily, but usually every other day, as I don’t like to grind flour more than a day ahead. It’s small enough that it’s easy to pull in and out of the cabinet.
It really is easy. If I want a huge batch of flour for, say, 6 loaves of bread and other bready things; I’ll haul out my Nutrimill and in one go-through, I will have very fine flour for breadmaking and pie crusts, etc. If I use my FGM, I have to run it through 2-3x to get it fine enough and I can’t make as big a batch at one time. However, basicly BAM! I got flour! I also can crack peas and beans in my FGM and get flour of both from both mills.
Time? Depends on what I’m making.
After you grind/crack/flake your grains, they should be stored in a cool place, out of the light.
As for the gluten intolerant question, I can only think of oats. Most of the oats found at the store are processed along with gluten grains, so they are “contaminated”. If you buy bulk oat berries, I assume you won’t have that issue.
I flake oats right now; planning on stocking up on more varieties as I go.
I grind finely for porridge, patties and bread: oats; white wheat; corn; soft wheat, rice, and spelt and red wheat in the past (out currently) millet (oh, YUM!), in the future to experiment with bean flour.
I crack for breakfast cereals, hot and cold: oats, soft wheat, corn, spelt and red wheat in the past.
HTH, ask away;
Rachel