The Thai/Malaysian people say that the roots make the product 'go off' quicker and are bitter. There are lots of videos how to grow them the way they have for hundreds of years, I guess.
I like the Washing up bowl, with black bucket inside. Black bucket has a hole at the level of the bamboo/mettle wrack. On top of the wrack place a piece of (large hole) plastic mesh. On top of this lay a piece of heavy cloth, like canvas, on top of this lay a piece of insect mettle mesh. Lay your Mung beans, (soaked for eight hours). Then repeat the process, cloth, mesh, beans 2 more times. Cover with a wet clean towel and keep in the dark.
The weight helps the beans to grow. Water twice a day in Winter, three times a day in Summer for 4 days.
The beans should have grown and you can cut them off the insect wire mesh.
Where can you get some insect wire mesh?
Another man uses stacking plastic boxes and T Towels and wire mesh. His is very good too.