You must also check to see what the minimum charge is for each slip. For instance, you can put a 20 ft boat in a 25 ft slip.... but you must pay for 25 ft.. An end tie is traditional reserved for larger vessels. On a dock with opposing 25 ft slips, the end tie could accommodate at least 50ft. So, you must always find out the minimum charge for each slip... regardless of the per foot fee.
It sounds like you're probably checking out California Yacht Marina on the East Basin in L.A. Harbor. ... That is a large body of water where the big ships can turn around... There are also quite a few live aboards in that marina... which is not a bad thing... because they help with security... and it's nice to see familiar faces. But they don't leave the dock too much. If I remember there are quite a few old Chris Craft's, Choy Lee's and other Taiwanese classics.... To me however, the biggest negative is the 4 to 5 miles out to the LA light or the inside harbor where everyone sails.
If sailing the boat a lot was my focus, I would be more inclined to check what's available at Cabrillo Marina... even join the Cabrillo Yacht club.. it's very reasonable... Then you're right where all the action is.. you can get down there after work, sail in hurricane gulch late afternoon... park the boat... be home in time for Bonanza. At the other place you can putz around in the basin...but that will get old... and it will take nearly an hour to get out to the sailing area near the light, and an hour to get back.