I have ordered 2 l3+ (for the September batch) along with 2 apw++ for the July S9 batch, and I was wondering what else I need to know/have before I am ready to begin mining. I am planning on setting up the machines in their own room of my home and I couldn't find any information about how many can be hooked up in one room or how many on the same circiut. Also is there anything I need to worry about regarding the placement of the miners or the powering of the miners or the profability of them in September. I am very new to mining and any helpful responses would be greatly appreciated.

(also it says I need a power cable for each APW++ and I was wondering what I need for that too)