Ditto on Mike and Frank's comments.
We are new to cats, I had chartered cats four times before but had always owned mono-hulls and to me that is real sailing. But, as Mike said, a long crossing sail on a cat is much more comfortable.
We now own a cat and I am still getting used to it. It is bigger and more comfortable, but it still feels like driving more than sailing.
Having owned both a mono hull and a cat in charter in the BVI, there is no question about what people want. Our cat is chartered back to back through the whole season.
So, as an owner, a cat is a better investment. As a sailor, I still prefer a mono.