A 29 gallon weighs 330 pounds full. Even a large tv weighs half of that. If you are going to try to use a tv stand, you are going to have to add some supports to it. Make sure it is made of solid wood, not compisition type wood. If pressed board gets even a little wet, as stands sometimes do when doing tank maintainance, it deteriorates, pretty much "melts", and loses support. When this happens, the tank goes down, lots of water on the floor.
If you could post a pic of the stand you built, I may be able to give you some ideas how to dress it up. This is a plain stand in my fish room, nothing fancy, does what it is supposed to;
This is the same design, wrapped in plywood, add a little trim, stain & varnish;
Mom sounds like my wife, didn't want something industrial or outdoor deck looking in the living room. If you can build the stand, spiffing it up isnt too much more work.
Tolak