We have three cats and made a "Cat Suite" just for them in the back half of our 195BH. They have the two bunk beds (with a midway platform to help with getting up in the top bunk). I added decorative bars to the extended back of the rear seat at the table and a screen door to finish the enclosure. A liter box is in the bathtub.
My wife does not want to use the toilet, the gas stove or store water. OK, we camp places where those facilities are and cook outside. Don't ask, it's what she is comfortable with (along with half a tiny camping trailer). You know the saying "A happy wife is a happy life". At 71, I want a happy life!