For only 2 weeks, a marina would be your best bet.
The easiest in this area would be Bahia Mar. Also the most expensive, but for 2 weeks, call them and ask for the rates.
Also Lauderdale Marine Center can accommodate a cat.

Good Afternoon,

I am just concluding the purchase of lagoon 470 catamaran and am looking for a liveaboard slip from Dec 1 to Dec 14, 2016 while I wait for new sails to be delivered. As I live in Portland, Oregon, I am not too familiar with any locations for liveaboard slips. Any help is greatly appreciated. Cat is 47' long and 25' beam.

Many thanks,

Nigel