It's only the two of us. I don't need ice for keeping the fish cool, as I don't fish
We do the 1 gallon bag of ice before we leave the house. And, we have this item that consumes no extra power, and creates ice for us:
Easy Release Ice Cube Tray | Rubbermaid
We keep two of them in the freezer, actually in the bucket where our Samsung RF18 Ice Maker is supposed to dump the ice. And, we also keep the 1 gallon bang of ice in this bucket. And still have room for more items to be stored. When the bag is about half empty, we toss a tray of ice into it, and get another batch going.
One of our main reasons for doing it this way, vs using the Samsung Ice Maker, is we wish to have better quality water going into the our ice.
We'd always used bottled water for drinking/coffee/cooking/ice making in most of the years we've been RV'ing. And even with our older Norcold 1200, we removed the ice maker, to allow more freezer storage.
We have a simple Camco filter at the hose bib, to get out the big stuff
! We go thru our On The Go water softener. Then our coaches OEM water filter, which does a pretty good job of the full house filtering. We added a 'Finisher Charcoal' filter to the new Samsung RF18, and tried the automatic ice cubes for about 4-6 months. But since we had also added an under sink RV Water/Filter Store filter and counter top faucet - we decided to we liked that water better. It also filters for cyst, so it adds another degree of safety.
So, we turned of the auto ice maker, use the 1 gallon bag, and the Rubber Maid ice trays. Our martinis, rusty nails, and other iced beverages taste better since making this move
But again, I do know several RV'ers that would consume two full trays of ice per day as they drink ice tea it seems from AM to PM
! So, one size does not fit all...
OP - If going Counter Top Ice Maker, which looks like a good all around compromise for cost and space. Do go ahead get Pure Sine Wave. Maybe get a bit larger unit, and only have it spliced into only feed the outlets to the kitchen. I would go bigger then smaller - and only do the cost of this upgrade one time. A 1000W PSW should cover the bulk of our kitchen related needs.
But, this may not be important to you, and a stand alone smaller inverter maybe exactly what you feel is right. Still recommend PSW, and also recommend one with a cooling fan.
Best of luck to you,