Thank you for the input in PSU. Looks like I am good to start with my original Corsair TX850 for now. I will look into upgrading to a better one when I add my fourth card as long as all goes as planned in about a month. Probably makes sense to keep the 850 and then just either add on another 850 just have two so I will never have to worry about coming close to power consumption. Thanks for the input, links, and suggestions!
Your 850watt from Corsair can handle up to 5 GTX 1060 but only after you have made the power consumption to 70-80% in MSI Afterburner utility. My latest build is with a Corsair 750 watt PSU and it is with 3 GTX 1060 plus GTX 1050 ti, the power consumption is set to 70% for each card and is running smoothly.