Found out an interesting thing you can do the other day that makes needing a plug n play charge kit unnecessary for idle boosting. This is only helpful for those who do not have 2 plug n play charge kits or 2 wired controllers (for wingman, KOH boosting).
Basically start up any match as though you're going to go idle for a couple of hours and finish the match. When the countdown to the next match reaches 0 and then the background changes to the title screen sort of background, turn off all controllers.
Your main controller should say "reconnect controller" and the split-screen controller should be paused. However, once the new map has been loaded your game will not pause and it will play as though you had both your controllers charging up. Try it out, you can idle boost with your controllers turned off without it pausing the game.
(Sorry if this has already been noted)