I thought I better give everybody who have replied to this thread an update. This project and other projects at this client site kept us pretty busy at times and then at times things were on hold due to late payments. All-in-all, we ended up putting local power supply in each building. Re-doing some cables ends and replacing some of the cameras with better cameras and put better lighting in some areas to help improve visibility. Putting the power supply in each building was the biggest improvement to the whole system.
Thanks for all of your feedback.