how do i start KEM farming??

The way I KEM farm is: I have defined my rainy day fund (1mil) and the I build KEMs in rows of 12 (3 map sections). As long as I have more money than my rainy day fund I start a new row. So the amount of rows depends on what time it is and what else has happened in the game. I play three to four 4h stints and then an 8hr stint for the night. So that's four or five collections of KEMs.