well this is great, I just finished setting up the two raspberry pi 3's to power the two side monitors, and my main machine is now running as single monitor. I can move mouse to the side monitors using the program Synergy so it's like a triple monitor setup without the hassles of windows, dialogs etc opening all over the place. I have lot of tweaking to do and still have to actually start using it to see if it fits my needs but so far it looks good.