I would be concerned about having a wood enclosure even if it's stained.
It would be difficult to keep clean and could get water damage from the humidity and harbor bacteria.

I built my wood enclosure around a glass tank.
I got the tank on Craigslist for $25 and it worked out well.

Easy to clean on the inside, yet the stained wood look outside.



I can give you some of the details if you like.