lots of variables I doubt if any shop would give a bid without looking at it .
Lowrance can be a real PIA especially if you are doing the NEMEA 2000 as well as Ethernet.
Some boats ain't real friendly to run wiring etc. and find places to hide stuff.
Infidel and proud of it.
From Genesis: "And God promised men that good and obedient wives would be found in all corners of the earth."
Then He made the earth round...and He laughed and laughed and laughed!