It would make an easy cheap way to store the boat off season so I think keep it. It is a selling point when you decide to move up(and you will want to move up!). As Krisscross says there are different kinds of trailers, some for launching, some you can tow with it and lift the boat off with a crane, and others that are more of a "yard trailer" not meant for use on the street. Also if your apartment complex has a large parking lot, you may be able to put the boat in a back corner off season, and it would be handy to have it so close. If you don't have a car you can always rent a U-Haul and tow it to or from the marina with that at the beginning or end of season. Home Depot and Lowe's also rent trucks by the hour and are heavy duty so will tow a bigger boat than a normal car could anyway.