Dear Jack,
Your enthusiasm in wonderful!!!
In my ignorance, here's what I've experienced:
1. Install a system that can work on 50hz or 60hz
2. Install an isloation transformer that can act as a ground so you don't burn through zincs on a hot dock
3. Install a 220 outlet in your aft deck to run a scuba compressor, and can be powered by shore power or genset
4. Heating and cooling zone system is use Samsung or Panasonic brand cost efficient mini-splits that can be purchased anywhere in the world. Have them connected to 24v invertor.
5. Use Tides shaft seals
6. Deck joints use black sydaflex which in my experience wears better with no mold signs and is sexy in contrast to the white deck
7. Sanitation hoses should be easy to access, repair and replace every 5-10 years, and not entombed in a Chinese box.
8. Selene should pre-stock your ship with a complete inventory of parts excluding electronics. Everything that could conceivably break down within 5-10 years (Starter Motors, Fuel Lift Pumps, Water pumps, Macerator pump, Toilet parts, LEDS, Fuses, SS bolts, nuts, washers, Filters, oils, greases, impellers, membranes, wiper blades, hoses, etc.), and they custom build should storage spaces for those parts.
9. Put the hot water tank somewhere where the long ass zinc can be accessed
10. Ship's safe have combo dial and not micky mouse digital with wiring that corrodes
11. Washing machine that can work on 24v inverted power
12. Install a waterproof pelican case ditch kit
13. Install a rack or cradle for your motorcycle or electric bikes
14. Install mounting for starlink on your mast
15. Install a boom to rig an emergency get home sail and get rid of the get home engine
16. Get rid of the twin anchors at the bow and just use one
Again, in my ignorance this is what I believe and have experienced.
~Lucky Chucky