3 hours labor? That includes lunch, and a half dozen coffee and smoke breaks right?
Do try and install it yourself.
The ONLY time consuming part was feeding the wire to the console. That's because the Lowrance connectors are a little large, and the connectors kept getting hung up when I was trying to feed it thru. Then I reorganize all my wires below, to make for a nice install, and to clean it up a bit.
Even with all of that done, it might have been maybe 2 hours at the MOST to complete.