Hi Evan,

Don't forget that costs of propane are only while underway/on anchor.
While at the dock almost all of these units switch to A/C.

I don't know the efficience of the model you mention, but I've had
Dometic propane refer for over 20 years on my mono-hull and it has
always worked just fine including long passages and once crossing the
Gulf Stream on our ear.

BTW, Dometic no longer produces the exact model we built into our
interior. It was their smallest unit but operates on propane or AC/DC
(DC draws too many amps to be practical). If they have a fault it is
their tendency to quit being efficient on propane after about five
years(we are on our fourth unit)despite working just fine on AC. Maybe
it has to do with living aboard full time in the tropics and salt air.

Also, so far as costs go, I've never run into anyone who has propane
who has ever had a repair problem....they simply don't seem to break
(sometimes require a cleaning of the burner orifice every couple of
years).

Good luck, hope you get out there soon