The most important part is it must remain dry. I leave it in the bag that it comes in, cutting only a smallish hole (an inch or so on diameter) which I keep clamped shut with a spring clamp.

In my main pantry I keep a 2qt container of the rice. When that container empties I go back and refill it again. I've had a bag last the better part of a year with no discernible loss and quality just by keeping it closed and climate controlled. In my bug out supplies I have a bunch of dry in mylar bags with oxygen absorbers. 3 years later they still taste exactly the same.

A $20, 25 lb bag has a little more than 50 cups of dry rice in it. Rice expands by a factor of 3 when you cook it.

A cup of cooked rice has little more than 200 calories with nothing in it. If I'm using as a main course, I plan for 1 and 1/2 to 2 cups per person, by the time you add seasonings and a reasonable amount of oil it brings it's not hard to get about a third of your daily calories out of a couple cups. You just have to be careful about nutrition because it doesn't have much.

So you could do 75 meals or maybe 150 sides out of a $20 bag of course paying for all the accoutrements to make it tasty.

Also of note stick to white rice for this. Brown rice still has the bran on it and a little bit of fat and tends to go bad faster. Also stay away from par-boiled rice, It cooks faster but it doesn't keep the same.