I have no experience with electrical wiring. Need some help. I'd like to keep things as simple as possible. All I need to run is a 40-60 lbs trolling motor, bow & stearn lights. That's it. I'm assuming I'll need a simple fuse box / switch panel. What gauge wiring do I need? How necessary is marine grade wire? Also, there's no way to hide the wiring inside the boat to run it from end to end. I'm concidering running it in the spray rail on the outside of the boat, good idea?