Can somebody enlighten me , please? problem for long range monitor (20+m) and Multi-monitor

[fatique]

Hello guys, i have a problem.

Here the situation:
i work at shop, at first floor, using computer. After work, i played game computer at second floor.
here's the deal: in other to minimize budge (and extra work ) , instead have 2 CPU , i decided only have 1 CPU. That CPU placed in 2'nd floor, so i just need monitor and 1'st floor and 2'nd floor. Is there any cable to connect those monitor? if there is, what is the recommended cable (like D-sub or hdmi), and what other necessary tool (need booster or something else)? the cable need approximately 20 or 25 meter.

So i can continue my work if necessary ( no need to run and work alone in creepy shop at night on first floor )

Thank you for your time

 

[cin19]

If you use the hdmi cable, it has maxi 45 feet ( less than 14 meter). Because you need to run 20/25 M distance, you need the active HDMI cable, like this http://www.ebay.com/itm/Monoprice-Commercial-Series-Active-Standard-HDMI-Cable-with-Equalizer-75-Black-/381453572589?hash=item58d06799ed:g:tXcAAOSw14xWNAyI
If you use D-sub, you need other like the extender too, like http://www.ebay.com/bhp/vga-over-cat5