I need some help on the max run on camera to monitor, power will be within 25 feet but run is 250 feet between camera and monitor Thanks.

You are fine with your 250' cable run... and you can push it maximum of 1,000'... Just make sure that you get quality cables...

yeah you need quality cabling,

For the long range exercise, you could use RG6 Quad shield. It's more ecnomically cheap and works very well.