Many reef invertebrates burrowed into things. They can't burrow into glass or acrylic but wood will leak because of this problem even if the structure of the tank is fine. This is just something to think about. I hate to clean up and take down a thriving 600 g tank that I may spend ten of thousands on because of a hole in the tank. If you really think about it, the cost of the tank in compare to the total cost is not too much. If you cannot afford to get a tank, you probably will not afford to up keep this tank. Believe me, I know from keeping my 450 g tank.
I have a friend who used to have a large home build wood tank. If you really want to talk to him send me an email and I see if I can dig his email address up for you.
Minh