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
Measure your household appliances
, do a taped layout on the cabin sole
and see where you can place things.