Need some help find a DVR system for my needs

[urmaj 0]

Hello,

 

A friend of mine has 4 cameras already wired up, but no DVR yet. Hes looking to add a DVR that can support the 4 wired cameras along with 2 Wireless cameras. He has an area that needs 2 cameras but doesn't have the ability to run cables from where the DVR will be located and where the cameras need to be.

 

Any info would be a big help.