I also placed my ducer at the bottom of the V and have thought along the same lines. Airmar makes a new ducer that incorporates the angle for your boat so you can drill a hole on either side of the hull and it will still shout straight down. As for the lights that’s another story. You could put one green on one side and one blue on the other for fish attraction. Or use two white lights can’t help you much there. That things to look out for is generating cavitation under the prop or props of the boat and not to put stuff where a fork lift normally would life the boat if it needed to.
FellowShip
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My motto: Just for the Grins