My Meowly does not like to climb too. As we living in a small apartment, the space is not big enough for him to do big move. However, we like to bring him back to our village during holiday, he can meet a lot of interesting friends there, big space and things to discover!
I live in a 200 square feet rooms in Kuala Lumpur Malaysia, and I own 2 cats. I believe I had a very similar situation of what you are having now, two cats not too happy with each other, small space and space for litter. I use a very special cat litter box which I can put them in the corner of...