I will disagree with some of the advice given...
1. I would avoid the balsa cored hull especialy in a blue water boat. If there is water ingress into the balsa core it is VERY difficult to spot by survey unless there is already extensive delamination. Delamination of a cored hull is VERY difficult to repair properly in remote places compared to fiberglass which can be worked on anywhere. 2. Marine Plywood is NOT a good choice for a deck core...ranking only above conventional plywood in potential problems. Far better would be end grain balsa or airex foam. A known issue with many Cheoy Lees is deck core rot. This can be fixed but is expensive and messy. Many have been fixed already and if you like this boat, I'd try to find one where the work has been done for you. A surveyor CAN tell about deck condition reliably if they are good and take their time. 3. The "3 layers of mahogany w/ fiberglass" is difficult to assess. If the boat was built fairly recently, it may be cold molded and this is an excellent building technique. Since it is mahogany...I am going to assume that is is simply an older wooden boat that was glassed over at some point to stop never ending leaks and rot. If it is simply a glassed over old wooden hull...I would walk away.