Something I noticed but forgot to comment on.
The woman has a class C motorhome, and the refrigerator commonly put into these models is a 6-cf unit, which is what we have in our class C. See photo below. It is indeed small compared to a residential fridge, but we have no problem storing food during our RV trek. And that's for 2 people.
It is true that we cannot keep a big jar of mayo like we have at home, and the ketchup bottle has to be small. But we never have to get them at convenience stores. Normal grocery stores carry them.
What are they talking about?