[dirtyroboto]

Man! 5k of rice requires you to know what you are doing and also about the rice you are cooking. You also need to know about your cooking tools ie. pans and hob.
How does your hob deliver the heat? like radius on the bottom of the pan!
If you use a pro hob then it will deliver a constant heat over a wide area, if it is a home range with basic hobs then forget it, cook it in batches.

Washing the stuff is almost as important as cooking it.

American Long grain sucks for quantity cooking.

The amount of water is critical for good short grain.

I suggest cooking a perfect 1kg before going for 5Kg as you will have to master quite a few factors before success.

Good luck bru!