Get it up first. Then take a look at it and see what it needs.
Id get it dried out, pull the interior including any carpet and let it dry outside of the boat. Look for any problems or discoloration in the fiberglass. Id pull the heads and have a look in the cylinders. clean out the carb. If cylinders look rusty, you may be in for a rebuild, but if its just surface rust you may be okay to run it, depends how bad it is. It will be a lot of work. If you are motivated it can be done quickly, and come out better than before for not a lot of money...Im rambling