There are true experts here that will hopefully weigh in on most of your questions..
But I seriously doubt that running your engine/fridge for one hour per day will cut it in the tropics. I think having an engine-dependant fridge would be the first thing I'd change.. also 330 AH is not a large bank, esp given your intention to run a washing machine via an inverter. Don't forget you really only have access to about half of that before recharging is advised.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)