In our new build we built in a 36" subzero all fridge in the kitchen. Just steps a way we a very large walk in pantry were we have the 32" Frigidaire stand up freezer. I didn't like the look of a whole wall of stainless steel and this way we could have our dream fridge and a freezer with lots of storage. I did put the cupboard panel on the outside of the fridge. The subzero fridges that are 100% fridge are cheaper because there is only one compressor. This how we maximized our space and got what we want to suit our budget. You could look at floor models or other brands.

Thank you so much sunnyalberta!

IIRC, the Kenmore (and those like it) are counterdepth units. They don't have as much space as you might think, as in, they aren't that big.

I have the Electrolux Icon all fridge (2 of those) and 1 all-freezer. (Electrolux is the parent company of Frigidaire, who also makes the Kenmore). They aren't big, but I've had full depth fridge/freezers and these give me more room with more accessible reach and better visibility. Cu ftage measurements don't tell you much unless its 'usable cubic feet,' and I think counter-depth, plus good organization (which might vary from Frigidaire to Kenmore to Electrolux because of different features) helps the usability. You'll want to compare the different names, in person if possible, to see which of those has the shelf options, bins, etc. that best suit your mother-in-law's needs.

By the way, we have 2 of the fridges, because we have 8 kids. It's rare, even in our house that both fridges are completely full at the same time, so 1 would probably serve most more modest sized households pretty well. The freezer, if she's used to a full size freezer, might be smallish.