If you have well over a year, why narrow it down to 4 boats rather than size? Expand your location for that matter, especially if you have time to sail it back to school. I looked at boats in Ohio, Arizona, NY, mexico, The Islands...
Look at this boat in California it is only 5K
68 33' Yorktown Sloop
Make the most of your money by utilizing as many options as you possibly can. The window of opportunity is only as wide as you allow it to be.
In a year from now the only thing that is going to matter is what you settled for. Make it count.
"Take it from me cuz i found
If you leave it then somebody else is bound
To find that treasure, that moment of pleasure
When yours, it could have been" Jimmy Buffet