NVR 120' From Monitoring Location - What To Do? Extend HDMI?

Here is situation. I have a nvr hikvision 9632 in comms closet about 120 feet from where it is to be viewed. The didtance is too far for hdmi cable. So are there techs out there using extenders for hdmi and how good do they work? I also need to extend mouse control so does extenders do dual function? The other option is using a pc with client software and running a cat 6 cable. I will have get a powerful pc as video with 24 cameras is quite taxing on processor. I assume i will have use a pc with i7 capabilities. Anyway whats best route to take?

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