I currently live aboard and solo sail my 30ft
Catalac 900 in the Med' and I can tell you I am more than comfy! I have standing
headroom in the
saloon with seating for at least five around the table (or two if you like to put your feet up!), nice sized
head and
shower room, two cabins (was 3 but converted one for storage) and even room for a 32inch LCD TV in the main
saloon.
Cost wise though, it's a double edged sword. You dont say where you are but here in
Europe, you'll pay at least an extra 50% per berth so no saving there as that means im paying the same as a 15 meter berth with my 10 meter boat. Also, most cats have twin engines so there is the potential to double up on servicing costs there as well. Having said that, you have more options to avoid
marinas and
anchor as you'll be able to get more sheltered locations as you can go into shallow water and being more stable means its more comfortable too.
However, I didn't buy mine to save
money, I bought it to be stable and comfortable. When im relaxing in my saloon for example, I can
see out! Monohulls tend to leave you feeling a bit closed in, certainly compaired with a light and airy cat
interior anyway. Also, when under way, there is less fatigue and stress do to the lack of heal. A flat ride is great when you have a nice cup of coffee!