How are you? Thanks for sharing.
Just a comment or two as I dissagree a bit: another option would be to move your battery further back in the boat at a location that would allow it to feed into the main house bank (charge from there also) and run cabelling to it and feed the house bank also.
As I said before, it is a real pain to run large cabelling (I just finished with 4/0). However, no more than a windlass
is used and the potential to put other large draw sytems in the V, why not go ahead and bite the bullet and run the cabelling? Put a switch on it to feed other systems, like a wash down or a water maker or a bow thruster or a spot light. It would be VERY easy keep these systems from running at the same time... and most of them would never be run at the same time even if they were not switched. In housing, we would run a sub panel to different areas of a house and feed off of it. It allowed from great expansion, fewer runs, and minimal loss.
Just thoughts. Initially, it will be a real pain the butt (and expensive) to run the cabelling. But afterwards you have increased the house bank (which really gets used) and have the potetial to feed other large draw systems.