I was thinking I could buy a $30 graphics card with two inputs for the two smaller monitors.
Let it only worry about the single 4K display. The 1060 has an open DP and an open DVI port, but my thinking is to not tax that GPU anymore. I'm just looking for the most efficient way to run this setup and have full 4K at the TV and do general PC stuff on the two monitors below. Should I install 2nd cheap non-gaming GPU card with two of the same outputs for those two monitors? I know windows is going to weird about the resolutions being different and the mouse will change size and position when going from the different resolutions but I don't mind that.
I would like 2 more small cheap 1080 monitors positioned under it for general browsing.
I have a nvidia geforce gtx 1060 6gb running HDMI to a Samsung 4k TV and I am perfectly happy with this for the little gaming I do and watching videos.