Umm.....I believe you were the one who asked about AC underway.
Can you run the toaster oven and or the AC while underway or is that generator / shore power only?
Running a single AC off a hi-output alternator and inverter is indeed practical for someone who has modest cooling requirements whilst underway. Really depends on their location, boat, and desire for climate control.
Personally, I don't understand why people live in places that need heat, let alone 9-months per year. Here in Florida, a few days of heat per year is needed, and AC is rarely needed between mid-Oct through mid-May or so. But hey, I moved from San Francisco partially because it was too cold.....
Peter
(St Pete FL)