Security Cameras for Multi Location

[Blake Garcia]

 I am looking for recommendations for security cameras that can be put at each location. 

I have 5 different complexes from 8-50 units each.

4-6 cameras for the smallest and probably 24 for the largest. I need to be able to view all remotely from my office and transfer between systems at each location.  Some would have to be wireless with a repeater on the large complex. Any brands or systems recommended or to stay away from.