If you really want a quick charge, get a dedicated charger and use it, not the one built into the converter.
I am curious why you would make that recommendation. The Intelipower converter that the original poster is considering is a multi-stage smart charger in addition to being a 12 volt power supply. It would seem to be pointless to buy a piece of equipment whose primary purpose is to charge RV batteries and then buy another battery
charger. Perhaps I'm missing something.
I agree with your other recommendations. I would add: don't replace blown fuses with ones with higher ratings. Byron's point was a good one. Too many people will replace a lower amperage fuse with a higher one because it is all they have at hand. That being said, I have lived in many houses and apartments with fuse panels and none have suffered fire damage of any kind (at least while I lived there). I am sure millions of others do as well but it does happen.
I would go back to my point earlier in the thread. Modern electronic converters are a completely different creature than the converters of even a decade ago. You should size a modern converter just as you would a battery
charger. Charging conditions are rarely ideal; low shore power voltage, temperature, the need to run vent fans or furnaces all lead to longer charge times than you might have calculated. Personally, I would go with a converter or charger whose output is rated at 20% of the capacity of the house batteries at least but that suits my intended use and not everyone's.