Life at a marina is different than life at sea or life on land. It's sort of a comprise between the two.

Pros:
-Security: Your boat will not drag anchor or get blew away in anything short of a Cat 5 hurricane.
-Convivence: Everything you could need is a quick car ride away or delivered to your slip just like with a land home.
-Neighbors: You can meet some of the best and most helpful sailors here.
-Homebase: It's a great place to catch your breath, do projects and prepare for leaving once again.
-Ocean Access: Most days I can take out my dinghy or paddleboard and see what's going on out on the water.

Cons:
-$$$: It costs similar rent a 1br apartment in that particular area.
-Noise: Trains, planes & automobiles are just a few things I don't miss about this lifestyle. Out on anchor it's just the waves and the wind.
-Neighbors: Sometimes the people around you are not the nicest(drunk, smoking, loud, rude).
-Privacy: With soo many boats and soo many people all around it can be hard to feel like you've got true privacy on your boat. Unlike being out on anchor.
-Becoming Lazy: A boat, especially a sailboat is meant to be out on the water. Not sit at a marina. Often a nice marina like this can turn into a trap if you're not careful.

I hope this description and this video gives you a better idea of what life at the marina is like. The realities that are involved and how you can make the most of it.

Cheers!