If you compare the amount of room in a
monohull and cat, you will find the marina costs to be very close (i.e. a larger monohull is needed to have the same living space of a smaller cat and marinas charge by length)
If your cruising plans are limited to the
Bahamas and some
Caribbean, then a cat is the way to go since most of the time you will be on the hook.
Both a cat and a monohull can be
single handed depending on the rig.
In the
USA, the biggest obstacle you will face as a cat owner is the lack of slips. Most
USA marinas haven't adapted to med-mooring and place cats at the end of a pier. This means limited space compared to monohulls.