First I mounted an iPad above the helm using a Sea Sucker product. It looks great. Then I put a Verizon MiFI and a wireless router on the boat. The wireless router pushes internet related traffic to the Mifi and manages the local traffic on the boat.
Finally I mounted a wireless IP camera on the bulkhead behind the engine. it's an outdoor camera with IR for night viewing. I get a nice view of the shaft, bilge and engine. Time will tell if it stands up to the marine environment.
The electronics are all 12V so I cut the tips off of the power supplies and used them to hard wire everything to the bus fed by the DC main breaker. I put a 10a inline fuse on the + side.
The setup also allows me to put weather radar, the Navionics app, MarineTrafffic.Com and etc on the iPad when I'm running (albinowners.net when I'm at the dock

Cost? $1/foot for marine 16/2 wire, a few butt splices, $49 for the camera and about $100 for the iPad mount. The rest of the stuff was in stock around the house. It's definitely less expensive and more functional than the Raymarine solution.