Here is a Journal of my 29 gallon viv build. It has been lots of fun, but isn't complete yet. Life is in the journey not the destination ; ).
I started with a 29 gallon tank, although price wasn't a huge issue it played a part. 29 gallon was a relatively inexpensive tank for the size. I will be housing 4 bumblebee darts ( it used to be 5
).