The main thing you want to look at is access to the sound. There are lots of marinas up the ct. river but it will take you half the day to get to open sailing. Most docks are going to be in the $90/ft area. There are moorings in westbrook, saybrook, new london, noank and mystic that are less expensive. Most historicly have a waiting list but the current times may be different. The season is aproaching quickly.
Good luck in your quest
Jim