Phil,
Thanks for the video share and your friends input.
I do hope I'm making the right choice, in the shed tonight I assembling a gimballed LPG (Eno Duo) with a 240V air fryer below mounted in my old Roden LPG oven frame.

I went this way in a mono as we need a gimballed cooktop, we also don't like our Induction cooktop at home especially when water boils over and the induction stops working until you remove the pot, wipe top down then start again. I can't see how it would work on a passage in a mono.
I originally fitted the ENO Duo stove with the factory gimbal, the original gimbals are terrible, couldn't fit our two favourite pots side by side, also they looked like they would do a nasty injury if you fell on the gimbals.
By my unscientific tests, induction at home then kettle on ENO on the boat, a modern heat exchanger kettle is about the same speed as an induction cooktop to boil water.

I hope having LPG and Airfryer will provide a level of redundancy.
will tell you if it works after I get back from December trip.