It would have to be a large cat to have hulls wide enough if in the lower part. Galley up cats would be more possible, but not below 50ft.
I was production manager of a
boat building company and we had a client
purchasing a custom 82 foot
trawler yacht. The wife wanted a household type stateroom,
head and galley layouts and had a residential
designer do the layout and presented it to us.
We could not build as desired, as the
designer did the galley layout at counter height, assuming that the 'walls' were vertical and the footprint was the same top and bottom and there were no stairwells and mechanicals in the way. We could mostly do the galley on the main
deck level, but the corners of things she wanted below decks in the heads and bedrooms would have had the corners sticking out the side of the angled
hull sides.
Measure your household
appliances, do a taped layout on the
cabin sole and see where you can place things.