Having spent 35 years or so with a luger kit boat, glass hull and deck but all the interior is self installed wood I can offer some advice and cautions. I rebuilt the v berth wooden cockpit and lots of bunk tops over the years. Luckily I avoided the hull issues with wood. The basic problem with wood though as mentioned by others is maintenance. Since all boats leak , especially at hatches etc. you will get fresh water below into the wood. Even with my wood all having been varnished and later fiberglass sealed or coated water still got in. Dry rot is the killer, it rots out the wood even when you have dried everything out every time you find sitting water. Any exposed wood grain will soak up water by capillary actions and retain it long enough to start dry rot. Its hard to spot without probing because the surface looks fine but the wood is punky underneath. So basic advice would be to drill around and poke all wood areas from the inside before worrying about outside. Particularly the structural elements like stringers and beams. Best of luck.